• Kirby as George
  • Tuff as Harold
  • Knuckle Joe as Captain Underpants
  • King Dedede as Melvin Sneedly
  • Escargoon as Professor Poopypants
  • Waddle Doo as Dr. Diaper
  • Lady Like as Mrs. Ribble
  • Sirica as Jessica Gordon
  • Rick as Mr. Fyde
  • Tiff as Stephanie Yarkoff
  • Meta Knight as Mr. Rustworthy
  • Pon as Evil George
  • Con as Evil Harold

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