Sid / Stack (voice)
Sid
Gabriela (voice) / Susie / Zeke / Mom (voice) / Miao Hu (voice) / QT9 (voice)
Gabriela / Dr. Bonabodon / Dad
Yangyang (voice) / Gerald / Dad
Yangyang / Gerald / Zeke
Yangyang
NiuNiu / Grandma / May (voice)
NiuNiu / Grandma / Miao Hu / May
Dr. Bonabodon (voice)
Dr. Bonabodon (face) / Bobbybot (voice) / Zeke / Ira (voice) / Zippa (voice)
Gerald / Dad / Popo (voice)
Susie / Zeke / PA Announcer / Pinki (voice)
Susie / Mom
Dr. Cordova
Dr. Cordova (voice)
Dr. Cordova