Guppy

Transformations

Guppy	Beelzebub	Super Bum	Yes Mother?	Bob	Fun Guy	Leviathan	Conjoined
Spun	Seraphim	Oh Crap	Bookworm	Spider Baby	Adult	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 or his familiars hit an enemy with a tear. Laser attacks from Brimstone, Technology and Tech X also work normally, but Mom's Knife and Technology 2 spawn flies only very rarely. Explosions and non-tear based attacks from familiars do not spawn flies.

Activated Collectibles

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

Passive Collectibles

Name	ID	Icon	Quote	Description
Dead Cat	81		9 lives	Sets Isaac's Red Heart containers to 1, but gives Isaac 9 extra lives. After dying, Isaac respawns with 1 Red Heart in the last safe room.
Guppy's Collar	212		Eternal Life?	Grants Isaac a permanent 50% chance to respawn with 1/2 of a Red Heart after death.
Guppy's Hair Ball	187		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		Cursed?	Increases chance of finding Locked Chests and normal Chests, but reduces chance of finding pickups.

Unlockable Achievements

• 

  Guppy's Hairball - Become Guppy.

• 

  Cat Got Your Tongue - Become Guppy.

Trivia

• This transformation is a reference to Edmund's first cat, as seen in some of his early videos on his personal channel.

Seeds

 PC  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  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  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  F4GJ 7ZHK (The Caves II, Boss Challenge Room, three Red Chests with Guppy's Tail, Guppy's Head and Guppy's Paw)