Jeff Bennett
Charlie (voice) / Zan-Tar / Apeman #3 (voice) / Grandpa / Gaillard (voice) / Dog...

Dee Bradley Baker
Nessie / Karl / Momsquatch (voice) / Carrot / Seymour (voice) / Duck / Tabby (vo...

Rob Paulsen
Solomon Fix (voice) / Flavio (voice) / Danny / Tickle Monster (voice) / HandyCat...

Kevin Michael Richardson
Dad / Announcer / Zit / Applause Fish (voice) / Ice Monster (voice) / Krunch / R...

Maurice LaMarche
Klemp (voice) / Birdsdorf / Apeman #1 (voice) / Bjorn / Working Troll #1 (voice)...

John DiMaggio
Mumpy (voice) / Roy (voice) / Jake / Ice Clops (voice)

John Kassir
Dugly Uckling / Kung Pao Bunny (voice) / Bone / Soldier A / Soldier B / Soldier ...

Annie Mumolo
Strikeout (voice) / Melissa / Rusty / Patch (voice) / Pixie / Little Prince / Mu...

Candi Milo
Bee (voice) / Nurse Duckett (voice) / Yumi / Octopus Dude (voice)

Charlie Schlatter
Chris (voice) / Sugarfoot (voice) / Willie / Gnome / Martin / Dwarf (voice)

S. Scott Bullock
Dorothy / Hummingbird (voice) / Dr. Carnage / Timmy / Mr. Abbott (voice) / Gi / ...

June Foray
Old Lady (voice) / Mall Walker / Old Man #1 / Man at Garbage Can (voice)

Jessica DiCicco
Smart Alec / Plasma Tot (voice) / Gloom / Fuzzy Animal (voice)

Billy West
Finster #1 / Johnny Space Guy / Pilot #1 / Space Thug (voice) / Moobeard / Value...

Chuck McCann
Navarro (voice) / Buck (voice)

Nika Futterman
Lulu (voice) / Cathy (voice)

Charlie Adler
Finster #2 / Evil Leader / Pilot #2 / Space Thug (voice) / Bossy LeCow / Raging ...

Colleen O'Shaughnessey
Tiffany / Mom (voice) / Kit / Little Girl / Some Kid (voice)

Lloyd Floyd
Gary Guitar (voice) / Fungus (voice)

Jennifer Hale
Victor's Mom / Express Mail / Co-Worker #3 (voice) / Ms. Penelope (voice)