StuGo

Tania Gunadi

Pliny (voice)

Zosia Mamet

Merian (voice)

Gabourey Sidibe

Francis (voice)

Lo Mutuc

Larry (voice)

Deborah Baker Jr.

Sara (voice)

Lorraine Toussaint

Dr. Lullah (voice)

Zach Reino

Chip (voice)

Jake Green

Mr. Okay (voice)

Ryan Gillis

Chicho (voice) / Chicho / Long Legs Mutant / Muscle Mouse (voice) / Chicho / Muscle Mouse (voice) / Chicho / Shrimp Mutant (voice) / Muscle Mouse / Turtle Mutant (voice)

Eric Bauza

Big Mitchell / Blood Pressure / Catapult Kevin (voice) / Big Mitchell / Parrot Mutant / Robot (voice) / Blood Pressure (voice) / Bomb Swapper / Defuser (voice) / Commerical Announcer (voice) / Grim Reaper / Arfthur (voice) / Honorabl3 Impartial-Bot / Big Mitchell (voice) / Nostrildamus / Pipsqueak / Tusky Boy (voice) / Question Bot (voice) / Wolf-Demon / Mutants (voice)

Fred Tatasciore

Alpha Betta / Referee Betta / Tough Betta (voice) / Bog Dog / Keanu Mutant (voice) / Dead Fish Mutant / Rock Iguana Mutant (voice) / Glands (voice) / Jean-Michel (voice) / Keanu Mutant / Snake Mutant / Frogatha's Dad (voice) / Nils Vulfen (voice) / Nils Vulfen / Ear Krill / Mudskipper (voice) / Snake Mutant / Shrimp Mutant (voice)

Grey DeLisle

Blobfish Mutant (voice) / British Narrator / Ivory Olfactus (voice) / Flamingo Mutant (voice) / Frogatha / Hand Holders Announcer / Flamingo Mutant (voice)

Sunil Hall

Sunil the Sailor (voice)

Steve Wolfhard

Lemonade / Pig / Rhino Mutant (voice) / Pig (voice) / Skeletal Walrus (voice)

Erica Jones

Rianne (voice) / Rianne / Bethany (voice)

Fryda Wolff

Merian's Mom (voice) / Nefarious Plants (voice)

Brian Jordan Alvarez

Plant / Guard #2 (voice) / Van (voice)

Marieve Herington

Crabecca / Bee Mutants (voice) / Zora (voice)

Dave Sebastian Williams

Narrator Fish (voice)

Kaitlyn Robrock

Tara / Baby Tara (voice)

Jessica Lowe

Kelp Commander (voice)

Johnny Pemberton

Peanut (voice)

Parvesh Cheena

Flounder Mutant (voice)

Cyrina Fiallo

Mariana Trent (voice)

Kayvan Novak

Thurst (voice)

H. Michael Croner

Bakey Potatie (voice)

Debra Wilson

Agent (voice)

Fortune Feimster

Scrumptious (voice)

Rama Vallury

Colonel John Stoneman (voice)

Flula Borg

Quartz (voice)

Josh Brener

Bombo (voice)

Robin Atkin Downes

Gunch (voice)

Tru Valentino

Zarconium / Doorbell (voice)

Stephen Root

Dr. Rostrum (voice)