Retribution Compatibility/List of Retribution Downgrades and Upgrades

A list of all the Antibaptismal Upgrades and Baptismal Downgrades changed by Fiend Folio when it is installed with Retribution, along with the Downgrades and Upgrades for Fiend Folio's own enemies, separated by floor.

Basement

Vanilla Enemies Down/Upgrades Changes (Basement)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Morsel	Gaper and Frowning Gaper	Gaper Upgrades Fatty 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Cyclopia 4.50% base chance 4.15% in Burning Basement and Ashpit 3.90% in Downpour and Dross 4.10% in Corpse Greed Gaper 0.75% base chance 0.69% in Burning Basement and Ashpit 0.65% in Downpour and Dross 0.68% in Corpse Flaming Gaper 6.95% chance Exclusive to Burning Basement Blurb 6.5% chance Exclusive to Downpour and Dross Wraith 6.5% chance Exclusive to Downpour and Dross Gurgle 2.25% base chance 2.10% in Burning Basement and Ashpit 1.95% in Downpour and Dross 2.05% in Corpse Faceless 4.50% base chance 4.15% in Burning Basement and Ashpit 3.90% in Downpour and Dross 4.10% in Corpse Mole 2.25% base chance 2.10% in Burning Basement and Ashpit 1.95% in Downpour and Dross 2.05% in Corpse Crackle 6.95% chance Exclusive to Ashpit Rotten Gaper 6.85% chance Exclusive to Corpse Twitchy 1.35% chance Exclusive to Corpse Slim 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Mr. Horf 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Haunted 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Woodburner 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse Wick 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse Powderkeg 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse Buckethead 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Cathy 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse Fishy 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse Fishaac 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Poople 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Sourpatch 7.45% base chance 6.95% in Burning Basement and Ashpit 6.50% in Downpour and Dross 6.85% in Corpse Nimbus 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse Guflush 3.75% base chance 3.45% in Burning Basement and Ashpit 3.25% in Downpour and Dross 3.40% in Corpse
Gaper	Cyclopia	Cyclopia Upgrades Gurgle 10% base chance 9.10% in Ashpit Faceless 10% base chance 9.10% in Ashpit Mole 10% base chance 9.10% in Ashpit Crackle 9.10% base chance Exclusive to Ashpit Slobber 10% base chance 9.10% in Ashpit Bleeder 10% base chance 9.10% in Ashpit Sooty 5% base chance 4.55% in Ashpit Dollop 5% base chance 4.55% in Ashpit Dweller (No Item) 5% base chance 4.55% in Ashpit Resident (No Item) 5% base chance 4.55% in Ashpit Sniffle 5% base chance 4.55% in Ashpit Balor 5% base chance 4.55% in Ashpit
No Downgrade	Horf	Horf Upgrades Sub Horf 10.65% base chance Psychic Horf 3.20% base chance Level 2 Horf 1.05% base chance Red Horf 21.30% base chance Mutant Horf 10.65% base chance Mr. Flare 10.65% base chance Mini-Min 5.30% base chance Shitty Horf 15.95% base chance Spitum 10.65% base chance Aquabab 5.30% base chance Glorf 5.30% base chance
Pacer	Hopper	Leaper	45.45% base chance 27% chance in Burning Basement and Dank Depths	Eggy	9.10% base chance 5.40% chance in Burning Basement and Dank Depths	Flaming Hopper	40.55% base chance Exclusive to Burning Basement
		Sticky Leaper	40.55% base chance Exclusive to Dank Depths	Tot	45.45% base chance 27% chance in Burning Basement and Dank Depths
Pester	Mulligan	Mulligoon	33.33% base chance 16.66% in Downpour and Dross 20% in Flooded Caves	Hive	16.66% base chance 8.33% in Downpour and Dross 10% in Flooded Caves	Nest	16.66% base chance 8.33% in Downpour and Dross 10% in Flooded Caves
		Prey	16.66% chance in Downpour and Dross 20% chance in Flooded Caves Exclusive to Downpour, Dross and Flooded Caves	Mullighoul	16.66% chance Exclusive to Downpour	Gas Dwarf	16.66% chance Exclusive to Dross
		Cushion	16.66% chance in Downpour and Dross 20% chance in Flooded Caves Exclusive to Downpour, Dross and Flooded Caves	Cistern	33.33% base chance 16.66% in Downpour and Dross 20% in Flooded Caves
Pester	Mulligoon	Mulligoon Upgrades Mulliboom 20% base chance 12.50% in Downpour and Dross 14.30% in Flooded Caves Hive 20% base chance 12.50% in Downpour and Dross 14.30% in Flooded Caves Nest 20% base chance 12.5% in Downpour and Dross 14.3% in Flooded Caves Bouncer 20% base chance 12.50% in Downpour and Dross 14.30% in Flooded Caves Prey 12.50% chance in Downpour and Dross 14.30% chance in Flooded Caves Exclusive to Downpour, Dross and Flooded Caves Mullighoul 12.50% chance Exclusive to Downpour Gas Dwarf 12.50% chance Exclusive to Dross Cushion 12.50% chance in Downpour and Dross 14.30% chance in Flooded Caves Exclusive to Downpour, Dross and Flooded Caves Cistern 20% base chance 12.50% in Downpour and Dross 14.30% in Flooded Caves
Mulligoon	Mulliboom	Mullikaboom
Gaper	Fatty	Conjoined Fatty	23.80% base chance 19.25% in Burning Basement 16.15% in Downpour, Dross and Flooded Caves	Pale Fatty	23.80% base chance 19.25% in Burning Basement 16.15% in Downpour, Dross and Flooded Caves	Fat Sack	4.75% base chance 3.85% in Burning Basement 3.25% in Downpour, Dross and Flooded Caves
		Flaming Fatty	19.25% base chance Exclusive to Burning Basement	Bloaty	16.15% base chance Exclusive to Downpour, Dross and Flooded Caves	Bubbles	16.15% base chance Exclusive to Downpour, Dross and Flooded Caves
		Big Smoke	11.90% base chance 9.60% in Burning Basement 8.05% in Downpour, Dross and Flooded Caves	Peepisser	11.90% base chance 9.60% in Burning Basement 8.05% in Downpour, Dross and Flooded Caves	Squidge	23.80% base chance 19.25% in Burning Basement 16.15% in Downpour, Dross and Flooded Caves
No Downgrade	Dip	Dip Upgrades Dripling 14.15% base chance Retribution Enemy Squirt 4.70% base chance Corn 2.85% base chance Brownie Corn 2.85% base chance Big Corn 4.70% base chance Drip 9.45% base chance Dung 14.15% base chance Spoop 9.45% base chance Drop 9.45% base chance Glob 9.45% base chance Blot 9.45% base chance Spicy Dip 9.45% base chance
Dip	Squirt	Dropling	39.45% base chance 31.25% in Downpour, Dross, and Flooded Caves Retribution Enemy	Dinga	13.15% base chance 10.40% in Downpour, Dross, and Flooded Caves	Dank Squirt	13.15% base chance 10.40% in Downpour, Dross, and Flooded Caves
		Hardy	7.90% base chance 6.25% in Downpour, Dross, and Flooded Caves	Splurt	20.85% chance in Downpour, Dross and Flooded Caves Exclusive to Downpour, Dross and Flooded Caves	Tall Boi	26.30% base chance 20.85% in Downpour, Dross, and Flooded Caves
No Downgrade	Fly	Fly Upgrades Attack Fly 22.2% base chance 15.40% in Downpour and Flooded Caves Moter 6.66% base chance 4.60% in Downpour and Flooded Caves Army Fly 11.1% base chance 7.70% in Downpour and Flooded Caves Ring Fly 4.44% base chance 3.10% in Downpour and Flooded Caves Dart Fly 11.1% base chance 7.70% in Downpour and Flooded Caves Pooter 22.2% base chance 15.40% in Downpour and Flooded Caves Willo 30.75% chance in Downpour and Flooded Caves Exclusive to Downpour and Flooded Caves Shot Fly 11.1% base chance 7.70% in Downpour and Flooded Caves Lightning Fly 11.1% base chance 7.70% in Downpour and Flooded Caves
Fly	Attack Fly	Attack Fly Upgrades Moter 14.10% base chance 11% in Downpour and Flooded Caves Army Fly 14.10% base chance 11% in Downpour and Flooded Caves Ring Fly 14.10% base chance 11% in Downpour and Flooded Caves Dart Fly 14.10% base chance 11% in Downpour and Flooded Caves Level 2 Fly 14.10% base chance 11% in Downpour and Flooded Caves Willo 22% chance in Downpour and Flooded Caves Exclusive to Downpour and Flooded Caves Shot Fly 14.10% base chance 11% in Downpour and Flooded Caves Lightning Fly 14.10% base chance 11% in Downpour and Flooded Caves Bead Fly 1.41% base chance 1.10% in Downpour and Flooded Caves
Attack Fly	Moter	Shoter
Fly	Level 2 Fly	Full Fly	20% base chance 16.66% in Downpour and Flooded Caves	Level 2 Willo	16.66% chance in Downpour and Flooded Caves Exclusive to Downpour and Flooded Caves
		Square Fly (either type)	10% base chance 8.33% in Downpour and Flooded Caves	Bumbler	20% base chance 16.66% in Downpour and Flooded Caves	Butt Fly	20% base chance 16.66% in Downpour and Flooded Caves
		Brood	20% base chance 16.66% in Downpour and Flooded Caves
Sip Retribution Enemy	Sucker	Full Sucker	36.35% base chance Retribution Enemy	Spit	18.20% base chance	Ink	18.20% base chance
		Spitroast	18.20% base chance	Sagging Sucker	9.10% base chance
No Downgrade	Round Worm	Pinhead	48.55% base chance Retribution Enemy	Roundy	9.70% base chance	Ulcer	9.70% base chance
		Night Crawler	9.70% base chance	Needle	4.85% base chance	Tube Worm	2.90% base chance
		Drink Worm	9.70% base chance	Bone Worm	4.85% base chance
Drumstick	Clotty	Mega Clotty	33.3% base chance 12.5% in Burning Basement 25% in Downpour, Dross, and Flooded Caves	Grilled Clotty	33.3% base chance 12.5% in Burning Basement 25% in Downpour, Dross, and Flooded Caves	Cloggy	25% base chance Exclusive to Downpour, Dross and Flooded Caves
		Brisket	62.5% base chance Exclusive to Burning Basement	Chunky	33.3% base chance 12.5% in Burning Basement 25% in Downpour, Dross, and Flooded Caves

Fiend Folio Enemies Down/Upgrades (Basement)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
No Downgrade	Wimpy	Slammer
Wimpy	Slammer	Stompy	75.75% base chance 58.15% chance in Burning Basement, Mines and Ashpit Upgraded Enemy	Smasher	15.20% base chance 11.65% chance in Burning Basement, Mines and Ashpit
		Cracker	9.10% base chance 7% chance in Burning Basement, Mines and Ashpit	S'More	23.25% chance Exclusive to Burning Basement, Mines and Ashpit
Horf	Red Horf	Shitty Horf	50% base chance	Mr. Crisply	25% base chance
		Mini-Min	25% base chance
Horf	Mutant Horf	No Upgrades
Gaper	Mr. Horf	Mr. Red Horf
Mr. Horf	Mr. Red Horf	No Upgrades
No Downgrade	Morsel	Slick
Gaper	Pester	Mulligan	50% base chance	Mulligoon	50% base chance
Morsel	Slim	Pale Slim
No Downgrade	Limb	Pale Limb
Gaper	Bowler	Striker
Pacer	Loafer	Bowler
Gaper	Slobber	No Upgrades
Gaper	Bleeder	Pale Bleeder
No Downgrade	Casualty	Toothache
Dip	Shitling	Dip
Shitling	Dung	Tall Boi
Dung	Tall Boi	Really Tall Boi	Exclusive to the Ascent
Fly	Shot Fly	Shoter
Shot Fly	Shoter	No Upgrades
Level 2 Fly	Square Fly (Any)	No Upgrades
Level 2 Fly	Bumbler	Phoenix	Guaranteed upgrade 50% chance in the Ascent	Buckshot	50% chance Exclusive to the Ascent
Fly	Potluck	No Upgrades
No Downgrade	Poobottle	Drainfly
Bead Fly	Butt Fly	No Upgrades
Round Worm	Drink Worm	Drunk Worm
No Downgrade	Weaver	Weaver Sr.
No Downgrade	Benign	Minimoon	50% base chance	Tumor	50% base chance
No Downgrade	Drumstick	Clotty

Cellar

Vanilla Enemies Down/Upgrades Changes (Cellar)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Baby Spider	Spider	Level 2 Spider	35.60% base chance	Big Spider	10.70% base chance	Rock Spider	10.70% base chance
		Tinted Rock Spider	0.356% base chance	Spooter	42.70% base chance
Level 2 Spider	Small Baby Long Legs	Baby Long Legs	76.90% base chance	Benny	23.10% base chance
Small Baby Long Legs	Baby Long Legs	Nanny Long Legs	76.90% base chance 43.50% in Flooded Caves and Ashpit	Tommy	23.10% base chance 13.05% in Flooded Caves and Ashpit	Gutbuster	43.50% base chance Exclusive to Flooded Caves
		Krass Blaster	43.50% base chance Exclusive to Ashpit
Level 2 Spider	Small Crazy Long Legs	Crazy Long Legs	76.90% base chance	Benny	23.1% base chance
Small Crazy Long Legs	Crazy Long Legs	Nanny Long Legs	76.90% base chance 43.50% in Flooded Caves and Ashpit	Tommy	23.10% base chance 13.05% in Flooded Caves and Ashpit	Gutbuster	43.50% base chance Exclusive to Flooded Caves
		Krass Blaster	43.50% base chance Exclusive to Ashpit
Level 2 Spider	Trite	Ragling	58.80% base chance 37.05% in Downpour, Dross and Flooded Caves	Skipper	37.05% chance Exclusive to Downpour and Dross	Globulon	37.05% base chance Exclusive to Flooded Caves
		Bombmuncher	29.40% base chance 18.50% in Downpour, Dross and Flooded Caves	Gobhopper	11.75% base chance 7.40% in Downpour, Dross and Flooded Caves
Sack	Walking Sack	Stumbling Sack	38.45% base chance Retribution Enemy	Coby	38.45% base chance	Sackboy	23.10% base chance
No Downgrade	Lil' Haunt	Imp	33.3% base chance	Candler	33.3% base chance	Menace	33.3% base chance

Fiend Folio Enemies Down/Upgrades (Cellar)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Spider	Spooter	Super Spooter	66.6% base chance	Litter Bug	33.3% base chance
Spooter	Super Spooter	Mega Spooter	Upgraded Enemy
Baby Spider	Skuzz	Ring Skuzz	33.3% base chance	Army Skuzz	33.3% base chance	Small Skuzzball	33.3% base chance
Skuzz	Ring Skuzz	No Upgrades
Skuzz	Army Skuzz	No Upgrades
Spider Egg	Sticky Sack	Walking Sticky Sack
Sticky Sack	Walking Sticky Sack	Stumbling Sticky Sack	Upgraded Enemy
Sack	Ransacked	No Upgrades
Spider Egg	Coby	Sackboy
Small Crazy Long Legs	Nanny Long Legs	No Upgrades
Fly	Zingling	Beeter	7.70% base chance	Stingler	7.70% base chance	Homer	7.70% base chance
		Ztewie	76.90% base chance
Fly	Beeter	Honey Eye
Level 2 Fly	Hover	No Upgrades
Level 2 Fly	Honey Eye	No Upgrades
Zingling	Stingler	Honeydrip
Zingling	Homer	Briar
Hover	Honeydrip	Beebee
Gaper	Marge	Colonel
Gaper	Haunted	Crotchety	50% base chance 33.3% in the Ascent	Dim	50% base chance 33.3% in the Ascent	Accursed	33.3% chance Exclusive to the Ascent
No Downgrade	Yawner	Moaner
Haunted	Dim	No Upgrades
Haunted	Crotchety	No Upgrades
Spoop	Shirk	Wizoob

Burning Basement

Fiend Folio Enemies Down/Upgrades (Burning Basement)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Slammer	S'More	Shaker
Flaming Gaper	Woodburner	No Upgrades
Flaming Gaper	Wick	No Upgrades
Red Horf	Mr. Crisply	Mr. Flare
Mr. Crisply	Mr. Flare	No Upgrades
Gaper	Powderkeg	Mullikaboom
Mulliboom	Mullikaboom	No Upgrades
Sucker	Spitroast	Spitfire	Upgraded Enemy
Gaper	Charlie	Sooty	85% base chance
		Big Smoke	15% base chance
Cyclopia	Sooty	No Upgrades
Fatty	Big Smoke	No Upgrades
Drumstick	Brisket	No Upgrades
Dark Ball	Smogger	Fumegeist
Mote	Fumegeist	No Upgrades
Dark Ball	Mote	Commission
Dark Ball	Commission	No Upgrades
Litling	Chili	No Upgrades

Downpour

Vanilla Enemies Down/Upgrades Changes (Downpour)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Horf	Sub Horf	Floaty	57.15% base chance	Spinny	42.85% base chance	Upgrade Replacement The original upgrade has a negligible weight compared to the Fiend Folio upgrades. It can be considered completely replaced
Gaper	Wraith	Rift Walker	50% base chance	Fishface	50% base chance
Mulligan	Prey	Drowned Hive	40% base chance	Swarmer	20% base chance	Cushion	40% base chance
Fatty	Bubbles	Bloaty	50% base chance	Tubby	50% base chance

Fiend Folio Enemies Down/Upgrades (Downpour)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Gaper	Buckethead	No Upgrades
Deep Gaper	Rift Walker	No Upgrades
Strider	Cushion	No Upgrades
Trite	Skipper	Gobhopper
Needle	Archer	No Upgrades
Sip Retribution Enemy	Mayfly	Mightfly
Spew Fly Retribution Enemy	Mightfly	Dewdrop	50% base chance
		Puffer	50% base chance
Mightfly	Dewdrop	No Upgrades
Sub Horf	Floaty	No Upgrades
Horf	Mini-Min	Bellow
Mini-Min	Bellow	No Upgrades
Willo	Tricko	No Upgrades
Willo	Ring Leader	No Upgrades
Level 2 Willo	Aleya	No Upgrades
Sub Horf	Bubby	No Upgrades
No Downgrade	Tango	Onlyfan
Tango	Onlyfan	No Upgrades

Dross

Fiend Folio Enemies Down/Upgrades (Dross)
Downgrade	Original Enemy	Upgrade
Red Horf	Shitty Horf	No Upgrade
Cyclopia	Dollop	No Upgrade
Dung	Connipshit	No Upgrade
Maw	Residuum	Sick Boom Fly
Gaper	Pipeneck	No Upgrade
Gaper	Shottie	Coloscope
Shottie	Coloscope	No Upgrade
Gaper	Wasty	No Upgrade
Wasty	Stomy	Trashbagger
No Downgrade	Delinquent	Peepisser
Delinquent	Peepisser	No Upgrade
Gaper	Cathy	No Upgrade
Gaper	Fishy	No Upgrade
Morsel	Necrotic	No Upgrade
Mayfly	Catfish	No Upgrade

Caves

Vanilla Enemies Down/Upgrades Changes (Caves)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Fatty	Pale Fatty	Fat Sack	50% base chance 33.3% in Mines	Quakey	33.3% base chance Exclusive to Mines	Mouthful	50% base chance 33.3% in Mines
Cyclopia	Bony	Bony Upgrades Black Bony 11.50% base chance Clickety Clack 6.90% base chance Big Bony 1.15% base chance Mr. Bones 11.50% base chance Dr. Shambles 11.50% base chance Marlin 11.50% base chance Possessed 23% base chance Crepitus 5.75% base chance Fracture 5.75% base chance Morvid 11.50% base chance
Spew Fly Retribution Enemy	Red Boom Fly	Boom Fly	20% base chance 8.33% in Downpour and Flooded Caves 14.30% in Dross	Kaboom Fly	20% base chance 8.33% in Downpour and Flooded Caves 14.30% in Dross Retribution Enemy
		Drowned Boom Fly	41.66% chance Exclusive to Downpour and Flooded Caves	Bloated Fly	16.66% in Downpour and Flooded Caves 28.60% in Dross Exclusive to Downpour, Dross, and Flooded Caves Retribution Enemy
		Warhead	20% base chance 8.33% in Downpour and Flooded Caves 14.30% in Dross	Doom Fly	20% base chance 8.33% in Downpour and Flooded Caves 14.30% in Dross	Warble	20% base chance 8.33% in Downpour and Flooded Caves 14.30% in Dross
Milk Tooth	One Tooth	Fat Bat	33.33% base chance	Foamy	33.33% base chance	Jawbone	33.33% base chance
One Tooth	Fat Bat	Ribbone	Guaranteed upgrade 33.3% chance in Flooded Caves	Bubble Bat	66.6% chance Exclusive to Flooded Caves
Globlet	Globin	Gazing Globin	28.60% base chance	Dank Globin	14.30% base chance
		Spoilie	28.60% base chance	Small Conglobberate	28.60% base chance
Globin	Gazing Globin	Dank Globin	28.60% base chance	Black Globin	14.30% base chance
		Spoilie	28.60% base chance	Small Conglobberate	28.60% base chance
Shiitake	Mushroom	Infected Mushroom	33.3% base chance	Cordify	33.3% base chance	Warty	33.3% base chance
Smidgen	Host	Red Host	12% base chance	Hard Host	8% base chance	Mobile Host	16% base chance
		Meatball	16% base chance	G. Host	8% base chance	Sludge Host	8% base chance
		Hoster	16% base chance	Cappin	16% base chance
Red Smidgen	Red Host	Flesh Mobile Host	50% base chance	Eroded Host	50% base chance
Host	Mobile Host	Flesh Mobile Host	33.3% base chance	Floast	33.3% base chance	Cappin	33.3% base chance

Fiend Folio Enemies Down/Upgrades (Caves)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Milk Tooth	Foamy	No Upgrades
No Downgrade	Stump	Slick
Morsel	Slick	No Upgrades
Slim	Pale Slim	No Upgrades
Pacer	Jim	Pale Slim
Limb	Pale Limb	No Upgrades
Cyclopia	Pale Bleeder	No Upgrades
Cyclopia	Balor	Eyesore
Cyclopia	Eyesore	No Upgrades
Gaper	Fathead	Blurb
Wasty	Poople	Sundae
Gaper	Dweller (Any)	No Upgrades
Gaper	Resident (Any)	No Upgrades
Embryo	Fishaac	Creepterum
Spew Fly Retribution Enemy	Fossilized Boom Fly	No Upgrades
No Downgrade	Edema	Redema
Weaver	Weaver Sr.	Thread	50% base chance	Dread Weaver	50% base chance
Drink Worm	Bunker Worm	No Upgrades
Maggot	Roly Poly	Isopoly
No Downgrade	Globlet	Globin
No Downgrade	Meatwad	Grilled Meatwad	50% base chance	Slag	50% base chance
Clotty	Chunky	No Upgrades
Shiitake	Ramblin' Evil Mushroom	Cordy
Hopper	Cordy	No Upgrades
Mushroom	Splattercap	No Upgrades
No Downgrade	Wobbles	Holy Wobbles
Mushroom	Infected Mushroom	No Upgrades
Red Smidgen	Smidgen	Red Smidgen	28.60% base chance	Eroded Smidgen	14.30% base chance
		Tittle	28.60% base chance	Hostlet	28.60% base chance
No Downgrade	Red Smidgen	Eroded Smidgen	50% base chance	Red Hostlet	50% base chance
Slammer	Hoster	Quaker

Catacombs

Vanilla Enemies Down/Upgrades Changes (Catacombs)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
No Downgrade	Maw	Red Maw	41.66% base chance	Psychic Maw	12.50% base chance
		2 Shrunken Heads	12.50% base chance	3 Shrunken Heads	12.50% base chance	Gunk	20.85% base chance
Maw	Red Maw	Gleek
Trite	Blister/p>	Spinneretch
No Downgrade	Wall Creep	Wall Writhe	69% base chance Retribution Enemy
		Fried	10.33% base chance	Ogre Creep	10.33% base chance	Scope Creep	10.33% base chance
Wall Creep	Blind Creep	Blind Writhe	69% base chance Retribution Enemy
		Fried	10.33% base chance	Arcane Creep	10.33% base chance	Scowl Creep	10.33% base chance
Small Maggot	Maggot	Charger	23.25% base chance 18.85% chance in Dank Depths	Spitty	7% base chance 5.66% chance in Dank Depths	Drowned Charger	23.25% base chance 23.25% chance in Dank Depths
		Dank Charger	18.85% chance Exclusive to Dank Depths	Creepy Maggot	23.25% base chance 18.85% chance in Dank Depths	Carrier	23.25% base chance 18.85% chance in Dank Depths
Maggot	Charger	Spitty	11.11% base chance 9.40% chance in Dank Depths	Drowned Charger	18.50% base chance 15.65% chance in Dank Depths	Dank Charger	15.65% base chance Exclusive to Dank Depths
		Level 2 Charger	5.55% base chance 4.70% chance in Dank Depths	Grub	18.50% base chance 15.65% chance in Dank Depths
		Sternum	18.50% base chance 15.65% chance in Dank Depths	Roly Poly	18.50% base chance 15.65% chance in Dank Depths	Sea Cucumber	9.25% base chance 7.80% chance in Dank Depths
Maggot	Spitty	Conjoined Spitty	33.3% base chance	Sea Cucumber	33.3% base chance	Retch	33.3% base chance
Round Worm	Night Crawler	Pinprick	54.55% base chance Retribution Enemy	Tube Worm	18.20% base chance	Para-Bite	9.10% base chance
		Bone Worm	18.20% base chance

Fiend Folio Enemies Down/Upgrades (Catacombs)
Downgrade	Original Enemy	Upgrade
Cyclopia	Sniffle	Dry Wheeze
Hopper	Tot	Tado Kid
Morsel	Tado Kid	No Upgrade
Horf	Spitum	No Upgrade
Cyclopia	Ragurge	No Upgrade
Sack	Sackboy	Pitcher
Sticky Sack	Spinneretch	No Upgrade
Baby Spider	Spider Egg	No Upgrade
Wall Creep	Ogre Creep	No Upgrade
Wall Creep	Scope Creep	No Upgrade
Spew Fly Retribution Enemy	Warhead	No Upgrade
Gaper	Sourpatch	No Upgrade
Pacer	Sourpatch Body	No Upgrade
Sip Retribution Enemy	Grape	Bunch
Grape	Bunch	Boom Fly
Mega Pooter Retribution Enemy	Mama Pooter	No Upgrade
Maggot	Creepy Maggot	No Upgrade
Fly	Flickerspirit	No Upgrade
Lil' Haunt	Menace	No Upgrade
Bony	Dr. Shambles	No Upgrade
Unshornz	Matte	No Upgrade
Stingler	Colonel	No Upgrade

Flooded Caves

Fiend Folio Enemies Down/Upgrades (Flooded Caves)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
No Downgrade	Drop	Dribble
Drop	Dribble	No Upgrades
Gaper	Nimbus	Floodface (Random)	50% base chance
		Stomy	25% base chance	Trashbagger	25% base chance
Nimbus	Floodface (Any)	No Upgrades
Fatty	Tubby	Globwad
Anemone	Geyser	Gasbag
Mushroom	Warty	No Upgrades
Fat Bat	Bubble Bat	No Upgrades
Pester	Cistern	No Upgrades
Baby	Bubble Blowing Double Baby (Either Half)	Bubble Blowing Double Baby
Baby	Bubble Blowing Double Baby	No Upgrades
Trite	Globulon	No Upgrades
Offal	Gutbuster (Any)	No Upgrades
No Downgrade	Eroded Smidgen	Eroded Host
Eroded Smidgen	Eroded Host	Clam
Morsel	Fishface	Rift Walker	~50% base chance	Fishfreak	~50% base chance
		Shiny Fishface	0.0244% base chance
No Downgrade	Frog	Catfish
No Downgrade	Wire	Psiling
Wire	Zapbladder	No Upgrades
Mushroom	Anemone	No Upgrades
Drowned Charger	Sea Cucumber	Magleech
Drowned Charger	Panini	Breadbin	Upgraded Enemy
Maggot	Isopoly	No Upgrades
Fly	Lightning Fly	No Upgrades
Poobottle	Drainfly	No Upgrades
Horf	Aquabab	No Upgrades

Mines

Vanilla Enemies Down/Upgrades Changes (Mines)
Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
Gaper	Faceless	Fanatic	33.3% base chance
		Guflush	33.3% base chance	Nobody	33.3% base chance
Cyclopia	Mole	Blasted
Sip Retribution Enemy	Ink	Soul Sucker	50% base chance	Spitroast	50% base chance

Fiend Folio Enemies Down/Upgrades (Mines)
Downgrade	Original Enemy	Upgrade
Drop	Glob	Sizzle
Glob	Sizzle	No Upgrade
Coal Spider	Coalby	Coupile
Coalby	Coupile	Cairn
Spooter	Anode	No Upgrade
Gaper	Craig	No Upgrade
Craig	Grazer	Technician
Shock Collar	Technician	No Upgrade
No Downgrade	Thumper	Drillbit
Slammer	Quaker	Flinty
Stalagnaught	Speleo	No Upgrade
Blaster	Anti Golem	No Upgrade
No Downgrade	Crucible	Crucible (Ignited)
Crucible	Crucible (Ignited)	No Upgrade
Maw	Blastcore	Rufus
Blastcore	Rufus	No Upgrade
Chunky	Grilled Chunky	No Upgrade
Meatwad	Grilled Meatwad	Pox
Smidgen	Cappin	No Upgrade
Cyclopia	Spanky	No Upgrade

Ashpit

Vanilla Enemies Down/Upgrades Changes (Ashpit)
New Downgrade	Original Enemy	Upgrade
Psychic Horf	Necro	Pyroclasm
Bony	Clickety Clack	Clickety Clash

Fiend Folio Enemies Down/Upgrades (Ashpit)
Downgrade	Original Enemy	Upgrade
No Downgrade	Flesh Maiden	Flesh Sistren
Flesh Maiden	Flesh Sistren	No Upgrade
Guts	Spiroll	Shellmet
Necro	Pyroclasm	Fireswirl
Pyroclasm	Fireswirl	No Upgrade
Sniffle	Dry Wheeze	No Upgrade
Bony	Marlin	No Upgrade
Clickety Clack	Fishfreak	No Upgrade
Clickety Clack	Clickety Clash	No Upgrade
Sternum	Ossularry	No Upgrade
Dried Offal	Skitter Skull	No Upgrade
Dried Offal	Krass Blaster (Any)	No Upgrade
Trite	Bombmuncher	No Upgrade
Slammer	Flinty	No Upgrade
Mole	Blasted	No Upgrade
Zingling	Ztewie	Briar
Homer	Briar	No Upgrade
Hover	Beebee	No Upgrade
Bumbler	Phoenix	No Upgrade
Polty	Gritty	No Upgrade

Depths

Vanilla Enemies Down/Upgrades Changes (Depths)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
No Downgrade	Knight	Knight Upgrades Selfless Knight 15.85% base chance Floating Knight 15.85% base chance Bone Knight 4.75% base chance Loose Knight 15.85% base chance Hollow Knight 15.85% base chance Toxic Knight 15.85% base chance Squire 15.85% base chance
No Downgrade	Floating Knight	Patzer
Brain	Membrain	Oob	50% base chance
		King (2 Pawns)	25% base chance	King (3 Pawns)	25% base chance
No Downgrade	Wizoob	Red Ghost	33.3% base chance
		Ghostse	33.3% base chance	Peek-a-boo	33.3% base chance

Fiend Folio Enemies Down/Upgrades (Depths)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Slick	Flanks	Psychoknight
Horf	Blare	No Upgrade
Bowler	Striker	No Upgrade
Stump	Pale Loafer	Striker
Slammer	Smasher	Cracker	40% base chance	Marzlammer	40% base chance
		Doomer	20% base chance
Knight	Toxic Knight	No Upgrade
Brain	Squire	No Upgrade
Floating Knight	Patzer	No Upgrade
Membrain	King (Any)	No Upgrade
Corn Mine	Scoop	Sundae
Scoop	Sundae	Soft Serve	50% base chance	Corn Load	50% base chance
Sundae	Soft Serve	No Upgrade
Corn Mine	Corn Load	Load
Corn Load	Load	No Upgrade
Lil' Haunt	Ghostse	Ripcord
Yawner	Peek-a-boo	Gnawful
Yawner	Gnawful	No Upgrade
No Downgrade	Temper	Sleeper
Yawner	G. Host	No Upgrade
No Downgrade	Scythe Rider	Pitchfork Hitcher	Guaranteed upgrade 50% chance in the Ascent	Reaper	50% chance Exclusive to the Ascent

Necropolis

Vanilla Enemies Down/Upgrades Changes (Necropolis)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
No Downgrade	Death's Head	Doom Fly	66.6% base chance	Blazer	16.66% base chance
		Cherubskull (5 Chain Links)	16.66% base chance
No Downgrade	Swarmer	Baro
Keeper	Hanger	Dangler

Fiend Folio Enemies Down/Upgrades (Necropolis)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Night Crawler	Bone Worm	No Upgrade
Maggot	Sternum	Splodum	50% base chance	Ossularry	50% base chance
Sternum	Splodum	No Upgrade
Spew Fly Retribution Enemy	Doom Fly	No Upgrade
Bony	Crepitus	Fracture
Bony	Mr. Bones	No Upgrade
Bony	Possessed	Mr. Bones	40% base chance	Crepitus	40% base chance
		Fracture	20% base chance
Yawner	Moaner	No Upgrade
Slammer	Cracker	Quaker	50% base chance	Slimer	50% base chance
Milk Tooth	Jawbone	Ribbone
No Downgrade	Jawbone (Corpse)	Ribbone
No Downgrade	Unpawtunate	Ribeye
Bony	Fracture	No Upgrade
Death's Head	Lil' Jon	Molar System
Death's Head	Molar System	No Upgrade
Sub Horf	Spinny	Dizzy	Exclusive to the Ascent
No Downgrade	Creepterum	Cordify	50% base chance	Baro	50% base chance
Swarmer	Baro	No Upgrade
Spitty	Calzone	Breadbin	75% base chance Upgraded Enemy	Panini	25% base chance
Level 2 Spider	Carrier	No Upgrade
Keeper	Dangler	No Upgrade
No Downgrade	Gravin	Tombit

Dank Depths

Vanilla Enemies Down/Upgrades Changes (Dank Depths)
New Downgrade	Original Enemy	New Upgrade
Maggot	Dank Charger	Gorger

Fiend Folio Enemies Down/Upgrades (Dank Depths)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Tar Bubble	Blot	No Upgrades
Blot	Pitcher	Melty
Fatty	Squidge	Globwad
Blot	Melty	No Upgrades
Pacer	Guflush	Trashbagger	50% base chance	Nobody	50% base chance
Maw	Gob	Mr. Gob	76.90% base chance	Dread Maw	23.10% base chance
Gob	Mr. Gob	No Upgrades
Maw	Gunk	Gob	76.90% base chance	Punk	23.10% base chance
No Downgrade	Punk	Gob
Meatwad	Slag	Pox	50% base chance	Outlier	50% base chance
Pacer	Gis	Vis
Slammer	Slimer	Smasher
Dank Charger	Gorger	No Upgrades
Host	Sludge Host	No Upgrades
Trite	Gobhopper	No Upgrades
Skuzz	Small Skuzzball	Skuzzball
Small Skuzzball	Skuzzball	No Upgrades
Tar Bubble	Grater	No Upgrades
Pacer	Piper	Boiler
Tar Bubble	Boiler	No Upgrades
Spooter	Litter Bug	Charmed Litter Bug	66.6% base chance	Toxic Litter Bug	33.3% base chance
No Downgrade	Charmed Litter Bug	Toxic Litter Bug
Litter Bug	Toxic Litter Bug	No Upgrades
Gaper	Trashbagger	Bunkter	50% base chance	Sixth	50% base chance
Fatty	Dumptruck	No Upgrades
Dank Death's Head	Dope's Head	Astroskull (2 Lil' Junkies Clockwise)	50% base chance	Astroskull (3 Lil' Junkies Clockwise)	50% base chance
Trashbagger	Bunkter	No Upgrades

Mausoleum

Vanilla Enemies Down/Upgrades Changes (Mausoleum)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
Knight	Loose Knight	Strobila	66.6% base chance	Gut Knight	33.3% base chance
No Downgrade	Cultist	Blood Cultist	25% base chance	Clergy	25% base chance
		Skulltist	25% base chance	Madhat	25% base chance

Fiend Folio Enemies Down/Upgrades (Mausoleum)
Downgrade	Original Enemy	Upgrade
Slammer	Shaker	Quaker
Cultist	Clergy	No Upgrade
Knight	Alfil	No Upgrade
Horf	Zealot	No Upgrade
Knight	Psychoknight	No Upgrade
Gaper	Sixth	No Upgrade
Wall Creep	Arcane Creep	No Upgrade
Full Fly	Psycho Fly	No Upgrade
Horf	Psystalk	Stolas
Psystalk	Stolas	No Upgrade
Cultist	Morvid	No Upgrade
Cultist	Acolyte	No Upgrade
Cultist	Skulltist	No Upgrade
Cultist	Zissuru	No Upgrade
Cultist	Madhat	No Upgrade
Cyclopia	Psyclopia	Alderman
Cyclopia	Alderman	No Upgrade
Fatty	Lunksack	No Upgrade
Maw	Shi	No Upgrade
Yawner	Empath	No Upgrade
Gusher	Nihilist	No Upgrade

Gehenna

Vanilla Enemies Down/Upgrades Changes (Gehenna)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
No Downgrade	Goat	Black Goat	50% base chance
		Bull	50% base chance
No Downgrade	Maze Roamer	Maze Runner

Fiend Folio Enemies Down/Upgrades (Gehenna)
Downgrade	Original Enemy	Upgrades
Goat	Bull	No Upgrade
Fatty	Super Shottie	No Upgrade
Faceless	Nobody	No Upgrade
Nobody	Discy	No Upgrade
Wall Creep	Scowl Creep	No Upgrade
Gaper	Maze Runner	No Upgrade
Gaper	Aper	Evil Twin
Pacer	Gabber	No Upgrade
Ghostse	Ripcord	No Upgrade
Fly	Bead Fly	No Upgrade
Full Fly	Manic Fly	Psycho Fly
Scythe Rider	Pitchfork Hitcher	No Upgrade
Bumbler	Kukodemon	No Upgrade
Blood Cultist	Haemo	No Upgrade
Blood Cultist	Lurch	No Upgrade
Tagbag	Punisher	No Upgrade

Womb

Vanilla Enemies Down/Upgrades Changes (Womb)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
Embryo	Baby	Angelic Baby	17.55% base chance	Unborn	8.75% base chance	Wrinkly Baby	17.55% base chance
		Fetal Demon	17.55% base chance	Baby Begotten	3.50% base chance
		Bubble Blowing Double Baby	17.55% base chance	Neonate	17.55% base chance
No Downgrade	Lump	Lipoma
No Downgrade	Dople	Evil Twin	50% base chance	Aper	50% base chance
Mega Clotty	Cohort	Chummer

Fiend Folio Enemies Down/Upgrades (Womb)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Dip	Spicy Dip	Berry
Spicy Dip	Berry	No Upgrade
Baby	Craterface	No Upgrade
Oob	Drooler	Musk
Baby	Harletwin	Effigy	50% base chance
		Thrall	50% base chance
Baby	Nuchal	No Upgrade
Gaper	Nuchal (Detached) (or Nuchal Cord)	Nuchal
No Downgrade	Punted (Detached)	Punted	50% base chance
		Nuchal (Detached)	50% base chance
Baby	Neonate	Wrinkly Baby
Weaver	Thread	Dread Weaver
Red Boom Fly	Warble	No Upgrade
Knight	Strobila	Gut Knight
Edema	Redema	No Upgrade
Globin	Globscraper	No Upgrade
Horf	Glorf	No Upgrade
Fatty	Globwad	No Upgrade
Casualty	Toothache	No Upgrade
Toothache	Chops	No Upgrade
Cohort	Chummer	No Upgrade
Embryo	Foe	Quack
Foe	Quack	No Upgrade
Nerve Ending	Motor Neuron	No Upgrade
Nerve Ending	Plexus	No Upgrade
Nerve Ending	Womb Pillar	Utero Pillar

Utero

Vanilla Enemies Down/Upgrades Changes (Utero)
New Downgrade	Original Enemy	New Upgrade
No Downgrade	Cod Worm	Nematode
No Downgrade	Meatball	Bola

Fiend Folio Enemies Down/Upgrades (Utero)
Downgrade	Original Enemy	Upgrade
Heart	Heartbeat	No Upgrade
Globin	Valvo	No Upgrade
Mulligan	Jammed	Red Jammed
Mulligan	Red Jammed	No Upgrade
No Downgrade	Hostlet	Host
No Downgrade	Red Hostlet	Red Host
Death's Head	Astroskull (Any)	No Upgrade
Sucker	Sagging Sucker	Soul Sucker
Red Boom Fly	Trickle (Flying)	Warble
Maggot	Magleech	No Upgrade
Spitty	Retch	No Upgrade
Benign	Minimoon	Planetoid
Mr. Dead's Eye	Peepling	No Upgrade
Mr. Dead's Eye	Peepee	No Upgrade
Nerve Ending	Utero Pillar	No Upgrade

Scarred Womb

Vanilla Enemies Down/Upgrades Changes (Scarred Womb)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
Hive	Leper (Any degrade)	Molly (Same degrade)
No Downgrade	Leper Flesh	Toma Chunk	50% base chance
		Incisor	50% base chance
Guts	Scarred Guts	Cellulitis	50% base chance
		Dogmeat	50% base chance

Fiend Folio Enemies Down/Upgrades (Scarred Womb)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Bleeder	Curdle	Curdle (Naked)
No Downgrade	Curdle (Naked)	Facade
Curdle (Naked)	Nailhead	No Upgrades
Curdle (Naked)	Contestant (Any)	No Upgrades
Contestant (Pierced)	Facade	No Upgrades
Pacer	Vacuole	No Upgrades
Maw	Gleek	Dread Maw
Leper Flesh	Incisor	No Upgrades
Blubber	Starving	No Upgrades
Fatty	Mouthful	Globwad	50% base chance
		Starving	50% base chance
Lump	Lipoma	No Upgrades
Meatwad	Pox	Outlier
Scarred Guts	Cellulitis	No Upgrades
Leper Flesh	Dogmeat	No Upgrades
Leper Flesh	Myiasis	No Upgrades
Myiasis	Brooter	No Upgrades
Myiasis	Head Honcho	No Upgrades

Corpse

Vanilla Enemies Down/Upgrades Changes (Corpse)
New Downgrade	Original Enemy	New Upgrade
Boom Fly	Sick Boom Fly	Droolie

Fiend Folio Enemies Down/Upgrades (Corpse)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Slammer	Marzlammer	No Upgrades
Dank Death's Head	Rotskull	No Upgrades
Rotskull	Rotdrink	No Upgrades
Gaper	Spoilie	Medium Conglobberate
Sick Boom Fly	Droolie	No Upgrades
Weaver Sr.	Diagetic	No Upgrades
Knight	Gut Knight	Psionic Knight
Rotten Gaper	Fingore	No Upgrades
Fingore	Bamboo Cutter	No Upgrades
Nerve Ending	Frayed Nerve	No Upgrades
Rotten Gaper	Torment	No Upgrades
Level 2 Charger	Putrefatty	No Upgrades
Pustule	Coconut	No Upgrades
Gasbag	Wheezer	No Upgrades
Festering Guts	Whale	No Upgrades
Festering Guts	Whale Guts	No Upgrades
Eye	Weeper	No Upgrades
Eggy	Cancer Boy	No Upgrades
No Downgrade	Cancerlet	Slick
Level 2 Horf	Musk	No Upgrades
Rotten Gaper	Bub	No Upgrades
Toma Chunk	Molly (Last two Degrades)	No Upgrades
Molly (Fully Degraded)	Molly (Slightly Degraded)	No Upgrades
Molly (Degraded)	Molly (Undamaged)	No Upgrades
Leper Flesh	Toma Chunk	No Upgrades
Globlet	Small Conglobberate	Medium Conglobberate
Globin	Medium Conglobberate	Large Conglobberate
Globwad	Large Conglobberate	No Upgrades
Oralid	Molargan	No Upgrades
Spider	Oralid	No Upgrades
Oralid	Oralopede	No Upgrades
Level 2 Spider	Quitter	No Upgrades
Level 2 Spider	Benny	Tommy
Benny	Tommy	No Upgrades
Big Spider	Knot	No Upgrades
Para-Bite	Nematode	No Upgrades

Cathedral

Vanilla Enemies Down/Upgrades Changes (Cathedral)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
Baby	Angelic Baby	Bubble Blowing Double Baby	50% base chance
		Neonate	50% base chance
Leech	Holy Leech	Psleech

Fiend Folio Enemies Down/Upgrades (Cathedral)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
Gaper	Chorister	No Upgrades
Mr. Dead's Eye	Inner Eye	No Upgrades
Small Angelic Baby	Effigy	No Upgrades
Brain	Primemind	No Upgrades
Bumbler	Deadfly	No Upgrades
Wobbles	Holy Wobbles	No Upgrades
Angelic Baby	Cherub	No Upgrades
Angelic Baby	Warden	No Upgrades
Death's Head	Cherubskull	No Upgrades
No Downgrade	Watcher Eye	Looker	33.3% base chance
		Seeker	33.3% base chance
		Watcher	33.3% base chance
Watcher Eye	Looker	Armoured Looker
Watcher Eye	Armoured Looker	No Upgrades
Watcher Eye	Seeker	No Upgrades
Watcher Eye	Watcher	No Upgrades
Watcher Eye	Dogrock	No Upgrades

Sheol

Vanilla Enemies Down/Upgrades Changes (Sheol)
New Downgrade	Original Enemy	New Potential Upgrades (and Conditions)
Lil' Haunt	Imp	Moaner
Knight	Selfless Knight	Bone Knight	33.3% base chance	Toxic Knight	33.3% base chance	Strobila	33.3% base chance
Knight	Bone Knight	Black Knight	50% base chance	Gut Knight	50% base chance
Globin	Black Globin	Cursed Globin	50% base chance	Medium Conglobberate	50% base chance
Leech	Kamikaze Leech	Black Maw	44.44% base chance	Holy Leech	11.11% base chance	Psleech	44.44% base chance

Fiend Folio Enemies Down/Upgrades (Sheol)
Downgrade	Original Enemy	Upgrade
Slammer	Doomer	No Upgrade
Red Maw	Dread Maw	No Upgrade
Weaver Sr.	Dread Weaver	No Upgrade
Gaper	Dominated	No Upgrade
Dominated	Ms. Dominator	No Upgrade
Gaper	Psi Hunter	No Upgrade
No Downgrade	Psyeg	Psiling
Psyeg	Psiling	Psleech
Psiling	Psleech	No Upgrade
Knight	Psionic Knight	No Upgrade
Psiling	Outlier	No Upgrade
Psiling	Crosseyes	Foreseer
Crosseyes	Foreseer	No Upgrade
Wire	Umbra	Blistered Umbra
Umbra	Blistered Umbra	Sombra
Umbra	Sombra	No Upgrade
Death's Head	Blazer	No Upgrade

Dark Room

Fiend Folio Enemies Down/Upgrades (Dark Room)
Downgrade	Original Enemy	Upgrade
Slim	Slim Shady	No Upgrade
Limb	Red Hand	No Upgrade

Ascent & Home

Fiend Folio Enemies Down/Upgrades (Ascent & Home)
Downgrade	Original Enemy	Upgrade
Spinny	Dizzy	No Upgrade
Scythe Rider	Reaper	No Upgrade
Fishaac	Missing Link	No Upgrade
Gaper	Mag Gaper	No Upgrade
Haunted	Accursed	No Upgrade
Bumbler	Buckshot	No Upgrade
Tall Boi	Really Tall Boi	No Upgrade

Miscellaneous

Fiend Folio/Retribution Enemies Down/Upgrades (Miscellaneous)
Downgrade	Original Enemy	Potential Upgrades (and Conditions)
No Downgrade	Stompy	Smasher	28.6% base chance	Cracker	28.6% base chance
		Hoster	28.6% base chance	Slimer	14.3% base chance
Walking Sticky Sack	Stumbling Sticky Sack	No Upgrades
Super Spooter	Mega Spooter	No Upgrades
Fly	Sip Retribution Enemy	Sucker	33.3% base chance	Ink	33.3% base chance
		Mayfly	33.3% base chance
Sucker	Full Sucker Retribution Enemy	Spitfire
Level 2 Fly	Ticking Fly	No Upgrade
Level 2 Spider	Full Spider	No Upgrade