The Cast are

  • Major Monogram as The Lorax
  • Carl as Once-ler
  • Phineas as Ted
  • Linda as Ted's Mother
  • Isabella as Audrey
  • Ferb as Pipsqueak
  • Betty as Ted's Grandma
  • Dr. Doofenshmirtz as Mr. O'Hare
  • ? as The Once-ler's Brothers
  • Guest star: Balthazaar Horowitz as Ned McDodd from Horton Hears a Who!

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