Fun Guy

Isaac turns into a walking Mushroom after picking up three distinct items from the following list. Grants a Red Heart container.

Passive Collectibles

Name	ID	Quote	Description	Quality
1up!	5.100.11	Extra life	Gives Isaac an extra life. Upon death, he will respawn in the previous room with full health, after which 1up! will disappear.	2
Blue Cap	5.100.342	HP + tears up + shot speed down	Gives one full Red Heart container, +0.7 tears, and -0.16 shot speed. Heals 1 additional Red Heart.	3
Magic Mushroom	5.100.12	All stats up!	Makes Isaac bigger. Adds one Red Heart Container, +0.3 Damage, x1.5 damage multiplier, +5.25 / +2.5 Range, and +0.3 Speed, and restores all Health.	4
Mini Mush	5.100.71	Speed + range up	Decreases Isaac's size, making him less likely to be hit. +0.3 speed, +1.5 tear falling speed, -4.25 range (effective range is increased). +0.3 speed, +2.5 range.	2
Odd Mushroom	5.100.121	HP + DMG up, speed down	Grants one empty Heart container, +0.3 damage, +0.25 range, +0.5 tear falling speed, and -0.1 speed. Grants one full Heart container, +1 damage, +1.5 range, and -0.2 speed	2
Odd Mushroom	5.100.120	Tears + speed up, DMG down	+1.7 tears, +0.3 speed, slightly reduces damage.	2
God's Flesh	5.100.398	Shrink shot!	Tears have a chance to shrink enemies, making them run away from Isaac. Shrunk enemies can be crushed and killed by walking over them.	1

The name Fun Guy is a slang term for psychedelic mushrooms and a wordplay on fungi.
Fun Guy may be a reference to the character of the same name in Chrono Cross.
Fun Guy"s appearance may be a reference to the character Toad, a humanoid mushroom from the Mario franchise.