Junkstrap
Junkstrap is a boss added in The Monthiversary Update that can appear in the 
Dank Depths.
Behavior
Junkstrap remains stationary near the top of the arena, and performs the following attacks:
- Spits out a bag of trash towards Isaac which bursts upon landing sending out a small shower of projectiles, a pool of black creep, and spawns 3-5 random types of flies:
- Spawns 2
Litter Bugs which are thrown a short distance to its left and right, or a single 
Toxic Litter Bug that's thrown directly towards Isaac.
- If there is at least 1 Litterbug of any kind alive in the room, then it will always spawn a Toxic Litterbug.
- Spews out a stream of arcing green projectiles that trails after Isaac's position. These projectiles create poisonous fart clouds on impact that can deal damage to Isaac.
- Sends out 5 streams of arcing projectiles and long-lasting black creep that spread out in evenly spaced lines; 1 directly below it and 2 evenly spaced to either side.
After completing each attack, Junkstrap will spit out a 
Dope's Head, which will bounce around the room.
- After 3 Dope's Heads have been spawned, Junkstrap whistles before sucking them in and then spitting them back out again, one at a time, towards Isaac. When these Dope Heads bounce once off a wall, or make contact with Isaac, they will burst into a ring of 10 tar and bone projectiles.
If Junkstrap is below 66% HP, and while there are currently no Dope's Heads in the room, Junkstrap will perform a new attack where it will summon out rows of 
Spikes; 1 vertical row on either the very left or right of the arena, 3 vertical rows on the opposite end, and 1 horizontal row at the very bottom. Afterwards, Junkstrap will then spit out a Pigskin projectile onto the single vertical row of spikes.
- After the Pigskin hits the ground it will proceed to bounce, creating a wave of fart clouds each time it lands which travel horizontally across the arena. These fart clouds will not damage Isaac, but can push him into the spikes. The Pigskin will bounce up to 5 times, traveling vertically up or down the room to line up with Isaac's last position after each bounce. The movement of the projectile and where it will land is indicated by a small crosshair on the ground.
- After the Pigskin projectile is destroyed, the spikes will retract, and Junkstrap will continue cycling through its other attacks.
Notes
- If Junkstrap dies while performing its Pigskin attack, the spikes will remain for a short while after the fight.
- Spikes created by Junkstrap will not harm Isaac if he has flight or effects that grant immunity to spikes, such as that granted by
Callus, which greatly trivializes the attack. - Entering Junkstrap's boss room or encountering it in a Boss Challenge Room will teleport Isaac to the bottom center of the room, similarly to
Gurdy.
Video Showcase
Trivia
- Junkstrap appears to be a Trashy Depths version of
The Gate, who has become a giant heap of trash and now resembles a gigantic Dope's Head.
- Originally, Junkstrap was designed as a champion variant, but was later redesigned into its own unique boss.
- Junkstrap's eyes, and Dope's Head's eyes after being spat out again, glow in the dark when the room or floor is under Curse of Darkness.
- In the MOD's files, a total of 61 conceptual names are listed for Junkstrap in a text document, though most of these appear to have been ironic.
- During its death animation, a small
Crudemate can be seen inside Junkstrap's cracked skull.
Gallery
Junkstrap blowing into its whistle, when it is about to suck in Dope's Heads or spit them out again.
Junkstrap dying. Note the Crudemate hiding within.
A Dope's Head spat out by Junkstrap after having been sucked in.
Junkstrap's Pigskin projectile.
Drawing of Junkstrap in the Bestiary and on Isaac's last will.
Junkstrap's health bar icon if Enhanced Boss Bars is installed.
 Bosses 
| |
|---|---|
| Chapter 1 | Buck - Honeydrop - The Whispers - Griddle Horn - Buster - Meltdown |
| Chapter 1.5 | Ghostbuster - Cacamancer |
| Chapter 2 | Battie - Kingpin - Slinger - Monsoon - Aquagob |
| Chapter 3 | The Organization - Gutso the Great - Luncheon - Pollution - Tsar - Junkstrap |
| Chapter 3.5 | Warp Zone - Dusk - Madomme |
| Chapter 4 | Basco - The Sun - Peeping - Cacophobia |
| Chapter 4.5 | Mr. Dead |
| Minibosses | Psion - Gravedigger - Hermit |
| Vanilla Boss Champions | Golden Plum - Ghost Larry Jr. - Mucus Monstro - Technopin - Albino Widow - Beehive Fistula - Possessed Hollow - Wine Husk - Kidney of Infamy - Alien Loki - Fiend Mom - Alien Lokii - Grinch Krampus |