Guppy

Transformations

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

Transformation ID	0

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

When Isaac or one of his familiars hits an enemy with a tear, a Blue Fly spawns.

Blue Flies have a 50% chance to spawn when Isaac or one of his familiars hits an enemy with a tear.

Laser attacks from Brimstone, Technology, Tech X and Urn of Souls 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	Quality
Guppy's Head	5.100.145		Reusable fly hive	Spawns 2-4 friendly Blue Flies that damage enemies.	3
Guppy's Paw	5.100.133		Soul converter	Upon use, converts one Red Heart Container into three Soul Hearts.	3

Passive Collectibles

Name	ID	Icon	Quote	Description	Quality
Dead Cat	5.100.81		9 lives	Sets Isaac's Red Heart containers to 1, but grants 9 extra lives. After dying, Isaac respawns with 1 Red Heart Container.	3
Guppy's Collar	5.100.212		Eternal life?	Grants a permanent 50% chance to respawn with 1/2 of a Red Heart after death.	2
Guppy's Hair Ball	5.100.187		Swing it	Spawns a familiar that loosely follows behind Isaac, which blocks shots can be swung like a flail to damage enemies. Grows bigger by killing enemies.	1
Guppy's Tail	5.100.134		Cursed?	Room Clear Awards have a 1/3 chance of being replaced with a Chest and a 1/3 chance being replaced with nothing.	2
Guppy's Eye	5.100.665		An eye for secrets	Shows the contents of Chests, Sacks, and Fire Places before they're opened/bombed.	2

Trinkets

Name	ID	Icon	Quote	Description
Kid's Drawing	5.350.169		Looks familiar...	While held, counts towards the Guppy transformation.

Notes

• If all the 9 extra lives have been consumed, Dead Cat is considered lost. This may even cause the transformation to be removed.
• Duplicates items still count separately towards the transformation.

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.
• In the original Binding of Isaac, this transformation was called "Cursed?"
• Transforming into Guppy as The Forgotten will give him apperance of a cat's skeleton.

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 JJZE PR1R (Cellar XL - Curse Room contains Guppy's Tail, Devil Deal red chests contain Dead Cat and Guppy's Collar)

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)

The Binding of Isaac: Rebirth
Achievements	Attributes	Bosses	Cards and Runes	Challenges	Chapters
Characters	Co-op	Items	Item pools	Monsters	Objects
Pickups	Pills	Rooms	Seeds	Transformations	Trinkets