Suggestions by @aaronpirelatinedo

Steelbeak

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Cedric Yarbrough

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Paul F. Tompkins

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Scoot McNairy

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Awkwafina

as Dr. Bellum in Darkwing Duck: Dangerous Mission

Glenn Howerton

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Boogey Man (The Grim Adventures of Billy & Mandy)

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Poe (Ruby Gloom)

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Audie Rick

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Boo Boo

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Utkarsh Ambudkar

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Jason Mantzoukas

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Wyatt Lindner

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Kue Lawrence

as Actors Already In The Cartoonverse in What Should Come From The Cartoonverse

Scaredy Bat

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Frank and Len

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Skull Boy

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Misery (Ruby Gloom)

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Iris (Ruby Gloom)

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse

Ruby Gloom

as Characters Already In The Cartoonverse in What Should Come From The Cartoonverse