Drew Massey

Sid / Stack (voice)

Misty Rosas

Sid

Alice Dinnean

Gabriela (voice) / Susie / Zeke / Mom (voice) / Miao Hu (voice) / QT9 (voice)

John Munro Cameron

Gabriela / Dr. Bonabodon / Dad

Allan Trautman

Yangyang (voice) / Gerald / Dad

Alon Williams

Yangyang / Gerald / Zeke

Matthew Yang King

Yangyang

Julianne Buescher

NiuNiu / Grandma / May (voice)

Dana Woods

NiuNiu / Grandma / Miao Hu / May

Christopher Lloyd

Dr. Bonabodon (voice)

Bruce Lanoil

Dr. Bonabodon (face) / Bobbybot (voice) / Zeke / Ira (voice) / Zippa (voice)

Victor Yerrid

Gerald / Dad / Popo (voice)

Donna Kimball

Susie / Zeke / PA Announcer / Pinki (voice)

Sonya Leslie

Susie / Mom

Kristin Charney

Dr. Cordova

America Ferrera

Dr. Cordova (voice)

Michelan Sisti

Dr. Cordova