• Thomas as Sonic
  • Timmy Turner (from The Fairly Oddparents) as Tails
  • Spencer as Antoine
  • Emily as Sally
  • Molly as Bunnie
  • Duck as Rotor
  • Toby as Uncle Chuck
  • Henry as Griff
  • Murdoch as Ari
  • Mavis as Dulcy
  • Diesel 10 as Dr. Robotnik (The Robotnik in AOSTH and Sonic X and The Robotnik in SATAM and SU are not different people, they are the same)
  • Diesel as Snively
  • Arry as Scratch
  • Bert as Grounder
  • Spencer as Coconuts
  • Daisy as Breezie
  • Hector as Robotnik Jr.
  • Emily (from Theodore Tugboat) as Sonia
  • Sunshine (from TUGS) as Manic
  • Top Hat (from TUGS) as Bartleby
  • Ten Cents (from TUGS) as Cyrus (Ten Cents and Cyrus are both voiced by Ian James Corlett in Salty's Lighthouse and Sonic Underground)
  • Zorron (from TUGS) as Sleet
  • Zug (from TUGS) as Dingo
  • Bertie as Young Sonic
  • Caroline as Young Sally
  • Sir Topham Hatt as King Acorn
  • Gordon as Knuckles
  • Rosie as Amy
  • Lady as Cream
  • Bulgy as Shadow
  • Elizabeth as Rouge
  • Lorry 1 as Delta
  • Lorry 2 as Beta
  • Lorry 3 as Epsilon
  • Toby as Chuck Thorndyke
  • Skarloey as Chris
  • Rheneas as Danny
  • Peter Sam as Cheese
  • Sir Handel as Chocola
  • Arthur as Mr. Tanaka

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