• Sonic the Hedgehog as Ariel
  • Amy Rose as Prince Eric
  • Sally Acorn as Sebastian
  • Cosmo the Plant as Scuttle
  • Cream the Rabbit as Flounder
  • Rouge the Bat as King Triton
  • Dr Eggman as Ursula
  • Miles "Tails" Prower as Melody
  • Wave as Hammerhead shark
  • Knuckles the Echidna, Espio the Chalmeleon, Shadow the Hedgehog, and Silver the Hedgehog as Triton's Daughter by Ariel's sister
  • Vector the Crocodile as Carlotta
  • Vanilla the Rabbit as Adult Flounder
  • Sonia as Grimsby

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