Jenny Slate
voices Pony Head
Eden Sher
voices Star Butterfly
Rider Strong
voices Tom
Adam McArthur
voices Marco Diaz
Alan Tudyk
voices Ludo
Alan Tudyk
voices King Butterfly
Artt Butler
voices Rafael Diaz
Corey Burton
voices Monster Arm
Dee Dee Rescher
voices Miss Skullnick
Jeffrey Tambor
voices Glossaryck
Matt Chapman
voices Alfonzo
Michael C. Hall
voices Toffee
Nate Torrence
voices Ferguson