- Mario as Sonic
- Dr. Mario as Sonic (Werehog)
- Fire Mario as Super Sonic
- Yoshi as Tails
- Luigi as Chip
- Bowser as Dr. Robotnik/Eggman
- Bowser Jr. as Orbot
- Peach as Amy
- Donkey Kong as Professor Pickle
- Petey Piranha as Dark Gaia
- King Kaliente as Perfect Dark Gaia
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