• Ralph as Dexter
  • Emily as Dee Dee
  • Professor Elm as Dexter's Dad
  • Wilhelmina as Dexter's Mom
  • Jack Pollockson as Dexter's Grandpa
  • Danny as Tall Dexter
  • Gary Oak as Mandark
  • Chigusa as Lee Lee
  • Rebecca as Mee Mee
  • Ash Ketchum as Douglas E. Mordecai
  • Marina as Agent Honeydew
  • Ephraim as Dexter's Monkey
  • Egan as Mandark's Duck
  • The Head of Security as Computer
  • Steven as Mr. Luzinsky
  • Morty as Koosalagoopagoop
  • Brad Van Darn as Action Hank
  • Bailey as Pony Princess Puff
  • Mikey and Timmy as The Puppet Pals
  • Dario as Major Glory
  • Tad as Vahallen
  • Koji as Krunk

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