S. Scott Bullock

T-Midi (voice)

77 eps

Audrey Wasilewski

Officer Rambamboo (voice)

77 eps

Nolan North

Oonski the Great (voice)

77 eps

Michael-Leon Wooley

Mr. Pumpers (voice)

77 eps

Candi Milo

Roni (voice) / Obnoxious Monster (voice) / Oonski's Mother (voice) / Big Ponda (voice) / One-Eyed Peekaboo's Mother (voice) / Burpa / Durpa / Murpa / Female Duck (voice)

7 eps

Trevor Devall

Captain Scurvybeak (voice) / Trash Bandit (voice) / Oonski's Father (voice) / Super Duck (voice) / Monster Bob (voice)

5 eps

Mick Wingert

Loafrechaun / Monster (voice) / Monster (voice) / Bread Foot (voice) / Rusty (voice)

4 eps

John DiMaggio

Lava Mole (voice)

3 eps

Max Mittelman

Cloud Monster (voice) / Monster Bill (voice) / Poltergoose (voice)

3 eps

John Kassir

Big Dumb Monster (voice) / Toilet Monster (voice)

2 eps