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Guppy's Hair Ball

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Guppy's Hairball Become GuppyGuppy's HairballGuppy's Hairball

Guppy's Hair Ball is an unlockable passive item.

Effects[edit | edit source]

  • Spawns a hair ball that loosely follows behind Isaac and can be swung like a flail, dealing contact damage to enemies and blocking projectiles.
    • The ball grows bigger by killing enemies, which increases its damage.
    • The size of the ball decreases upon entering a new floor.
  • This item belongs to the GuppyGuppy App.pngGrants flight and spawns a blue fly each time a tear hits an enemy. set. Collecting three items from this set will transform Isaac into Guppy.

Notes[edit | edit source]

  • Added in Afterbirth Killing the flies that Hush spawns does not increase its size.
  • If Isaac is Guppy, Guppy's Hair Ball will cause flies to spawn when dealing contact damage.
  • Guppy's Hair Ball has 5 levels and increases by one level upon killing an enemy.
    • The damage it deals per tick is equal to level * 2 + 3, with damage per second twice of that.
    • Upon entering a new floor, if it is level 2, it reverts to level 1. If it is level 3 or 4, it reverts to level 2. If it is level 5, it reverts to level 3.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • This item is used in Challenge #8 (Cat Got Your Tongue).
  • The function and flavor text of this item might be a reference to the idioms "no room to swing a cat" or "can't swing a dead cat without hitting...".
  • In the original Binding of Isaac, Guppy's Hairball did not count towards a Guppy transformation.


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