• Diesel 10 as Horrid Henry (Diesel 10 and Horrid Henry are both villians)
  • Isobella as Perfect Peter
  • James as Brainy Brian
  • Henry as Anxious Andrew
  • Emily as Gorgeous Gurinder (Not Daisy, Daisy is bad, Gorgeous Gurinder is good)
  • Percy as Goody-Goody Gordon
  • Rosie as Prizzy Polly (Prissy Polly's voice suits Rosie)
  • D261 as Soggy Sid
  • Victoria as Rich Aunt Ruby
  • Daisy as Moody Margret
  • Mavis as Sour Susan
  • Duck as Beefy Bert
  • Thomas as Aerobic Al
  • Edward as Mr. Mossy
  • Diesel as Rude Ralph
  • Dennis as Dizzy Dave
  • Mr. Happy (from Mr. Men) as Jolly Josh
  • Gordon as Tough Toby
  • Toby as Kind Kasim
  • Spencer as Stuck Up Steve (Not Percy, Percy is kind, Steve is mean)
  • Bertie as Tidy Ted

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