Mongo Baby 
Effects
- Spawns a familiar that cycles between the tears of Isaac's other familiars.
- If no familiars are present, Mongo Baby will fire normal tears that deal 3.5 damage.
- (Removed in Repentance) Mongo Baby shoots once every half second.
- (Added in Repentance) Mongo Baby shoots once every 1/3rd of a second, shooting at the same speed as Isaac at base tears.
- (Added in Afterbirth) This item belongs to the Conjoined set. Collecting three items from this set will transform Isaac into a three-faced version of himself.
Notes
- Familiars that Mongo Baby can copy include:
- Mongo Baby will not copy the tear effects of trinket familiars ((Isaac's Head) Isaac's Head and (???'s Soul) ???'s Soul).
- Mongo Baby will not copy the tear effects of the level 2
Cube of Meat or
Ball of Bandages.
- Mongo Baby will not copy the tear effects of (Added in Afterbirth †)
Buddy in a Box, (Added in Afterbirth)
Fate's Reward, (Added in Afterbirth)
Incubus,(Added in Afterbirth †)
Lil Monstro or (Added in Afterbirth)
Seraphim.
- With (Added in Afterbirth)
Lil Loki, Mongo Baby's tears will become red, but Mongo Baby will not fire in four directions.
- If Isaac has
Demon Baby alongside other familiars, Mongo Baby's behavior switches between the two. When Isaac is firing tears, Mongo Baby fires alongside him with a reduced fire rate. When Isaac is not firing tears, Mongo Baby copies Demon Baby's effect and automatically fires at nearby enemies.
- If Isaac only has Demon Baby and Mongo Baby, Mongo Baby behaves like the Demon Baby exclusively.
- Mongo Baby will not copy familiars spawned by
Monster Manual.