Cast[]
- Sonic as George Beard
- Tails as Harold Hutchins
- Knuckles as Captain Underpants
- Chris Thorndyke as Sulu the Hamster
- Cheese as Crackers the Petrodactyl
- Dr. Eggman/Dr. Robotnik as Mr. Krupp
- Mama Robotnik as Mrs. Ribble
- Scratch as Mr. Meaner
- Grounder as Mr. Rected
- Coconuts as Mr. Fyde
- Breezie as Mrs. Anthrope
- Fiona Fox as Mrs. Guiled
- Infinite as Melvin Sneedly
- Mighty as Tim Bronski
- Ray as Stevie Loopner
- Amy Rose as Jessica Gordon
- Mephiles as Dr. Diaper
- O'Nux as Captain Blunderpants
- Scourge as Evil George
- Miles Prower (Anti-Tails) as Evil Harold
- Patch as Evil Sulu
- Black Doom as Professor Poopypants
- Cosmo as Stephanie Yarkoff
- Cluck as The Bionic Booger Boy
- Uncle Chuck as Mr. Rustworthy
- Jules Hedgehog as George's Dad
- Rosemary Prower as Harold's Mom
- Cream as George and Harold’s Sister
- Charmy as Harold's Grandpa
- Saffron as George's Grandma
- Sally, Bunnie and Dulcy as Zorx, Klax and Jennifer
- Bocoe as Robo-George
- Decoe as Robo-Harold
- Bokkun as Dinosauar
- Badniks as Other Kids
Version 2[]
- Tails as George Beard
- Chris Thorndyke as Harold Hutchins
- Cheese as Sulu
- Chocola as Crackers
- Vector as Captain Underpants
- Dr. Robotnik (AoStH)/Dr. Eggman as Captain Blunderpants
- Dr. Robotnik (SatAM/SU) as Professor Poopypants
- Decoe as Evil George Beard
- Bocoe as Evil Harold Hutchins
- Bokkun as Evil Sulu the Hamster
- Silver as Melvin Sneedly
- Shadow as Mr. Krupp
- Rouge as Mrs. Ribbles
- Breezie as Mrs. Anthrope
- Robotnik Jr. as Mr. Meaner
- Dr. Warpink as Mr. Rected
- Sonic as Mr. Fyde
- Knuckles as Tim Bronski
- Snively as Stevie Loopner
- Espio as Mr. Rustworthy
- Cosmo as Jessica Gordon
- Nelson Throndyke as George's Dad
- Lindsey Throndyke as Harold's Mom
- Chuck Throndyke as Harold's Grandpa
- Ella Throndyke as George's Grandma
- Amy Rose as George and Harold's Sister
- Scratch as Robo-George
- Grounder as Roboe-Harold
Version 3[]
- Scratch as George Beard
- Grounder as Harold Hutchins
- Coconuts as Sulu the Hamster
- Cluck as Crackers the Petrodactyl
- Music Destroyer as Captai Underpants
- Chris Thorndyke as Captain Blunderpants
- Sonic as Evil George
- Tails as Evil Harold
- Knuckles as Evil Sulu
- Silver as Melvin Sneedly
- Dr. Robotnik as Mr. Krupp
- Mama Robotnik as Mrs. Ribbles
- Robotink Jr. as Mr. Meaner
- Breezie as Mrs. Anthrope
- Snively as Mr. Rected
- Bokkun as Mr. Rustworthy
- Antoine as Mr. Fyde
- Amy as Zorx
- Cosmo as Klax
- Cream as Jennifer