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Guppy Beelzebub Added in Afterbirth Super Bum Added in Afterbirth Yes Mother? Added in Afterbirth Bob Added in Afterbirth Fun Guy Added in Afterbirth Leviathan Added in Afterbirth Conjoined
Added in Afterbirth Spun Added in Afterbirth Seraphim Added in Afterbirth Oh Crap Added in Afterbirth † Bookworm Added in Afterbirth † Spider Baby Added in Afterbirth † Adult Added in Afterbirth † Stompy


Isaac turns into his cat Guppy after picking up any 3 distinct items from this item pool.

As Guppy, Isaac gains flight and spawns a Blue Fly every time he hits an enemy with a tear. Flies do not spawn when dealing damage without tears (except Brimstone Brimstone), such as with Mom's Knife Mom's Knife or Epic Fetus Epic Fetus.

Activated Collectibles[edit | edit source]

Name ID Icon Quote Description
Guppy's Head 145
Guppy's Head
1 rooms
Reusable fly hive Spawns 2-4 Blue Flies to damage enemies.
Guppy's Paw 133
Guppy's Paw
Soul converter Removes one Red Heart container in exchange for gaining 3 Soul Hearts.

Passive Collectibles[edit | edit source]

Name ID Icon Quote Description
Dead Cat 81 Dead Cat 9 lives Sets the amount of Red Heart containers to 1, but gives Isaac 9 extra lives. After dying, Isaac is teleported to the last safe room. New Red Heart containers can be obtained after picking up this item, but after each death, the number of Red Heart containers is set to 1 again.
Guppy's Collar 212 Guppy's Collar Eternal Life? Grants Isaac a permanent 50% chance to respawn with 1/2 of a Red Heart after death.
Guppy's Hair Ball 187 Guppy's Hair Ball Swing it Loosely follows behind Isaac. It can be swung like a flail by rapidly spinning Isaac in a circle. Grows bigger by killing enemies.
Guppy's Tail 134 Guppy's Tail Cursed? Increases chance of finding Locked Chests and normal Chests, but reduces chance of finding pickups.

Unlockable Achievements[edit | edit source]

Trivia[edit | edit source]

Seeds Disables achievements[edit | edit source]

 PC  Normal mode only XWN6 1YWH (The Basement I - Curse Room above spawn contains 2 Red Chests and Bomb Chest, Guppy's Collar, Guppy's Head and Dead Cat respectively)

 PC  Normal mode only 7TC3 43F1 (The Cellar I - Curse Room above spawn contains 2 Red Chests and Bomb Chest, Guppy's Collar, Guppy's Paw and Guppy's Head respectively

 PC  Added in Afterbirth Greed mode only W82M ZL3F (The Basement, Eden only - Start with Guppy's Head, Golden Treasure Room contains Guppy's Paw, Silver Treasure Room contains Guppy's Tail)

 3DS  Hard mode only F4GJ 7ZHK (The Caves II, Boss Challenge Room, three Red Chests with Guppy's Tail, Guppy's Head and Guppy's Paw)

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