The Vomit Monster is just a green blob of barf with a single eye in the center of it's face and two long arms.
After Pacifica recovered from her vomit problem in Bill and Pacifica's insides: Part II, the monster melted on a building then the building had the leftover vomit melted away as well.
- Bill and Pacifica's insides: Part I (debut, cameo)
- Bill and Pacifica's insides: Part II (latest appearance)
- Although, Blankface said that Pacifica was responsible for creating the monster, the Gangack Gang had the actual responsibility.