Astro / Toby (voice)
Cora (voice)
Hamegg (voice)
Orrin (voice)
Sparx (voice)
Dr. Elefun / Robotsky (voice)
President Stone (voice)
"Our Friends" Narrator (voice)
Dr. Tenma (voice)
Widget (voice)
Sludge (voice)
Zog (voice)
Mr. Squirt / Math Cowboy / Boxer Robot (voice)
Mr. Squeegee / Scrapheap Head / Stinger Two (voice)
General Heckler (voice)
Grace (voice)
Cora's Mom (voice)
Trashcan (voice)
Zane (voice)
Mr. Moustachio / Burning Robot (voice)
Mike the Fridge (voice)
The Little Stinker (voice)
"Oh No!" Kid (voice)
Dr. Pigknuckle / Newscaster (voice)
Bride to Be (voice)
Cowboy Robot (voice)
French Waiter Robot (voice)
Billy (voice)
Sam (voice)
Press Secretary (voice)
Metro City Sergeant (voice)
Metro City Girl (voice)
Cora's Dad (voice)