Cast[]
- Sonic as Kirby
- Tails as Bandana Waddle Dee
- Knuckles as King Dedede
- Shadow as Meta Knight
- Vector as Rick
- Espio as Coo
- Charmy as Kine
- Silver as Marx
- Chris Thorndyke as Gooey
- Amy as Ribbon
- Cream as Adeleine
- Infinite as Dark Meta Knight
- Chaos 0 as Daroach
- Antoine as Magolor
- Rotor as Taranza
- Sally as Susie
- Rouge as Francisca
- Wave as Flamberge
- Breezie as Zan Partizanne
- Dr. Eggman/Dr. Robotnik as Void Termina
- Metal Sonic as Hyness
- Zavok as Whispy Woods
- Scratch/Decoe as Pon/Goldon
- Grounder/Bocoe as Con/Silvox
- Zazz as Yggy Woods
- Zenna as Grand Mam
- Master Zik as Kracko
- Orbot & Cubot as Twin Kracko
- Mephiles as Galacta Knight/Morpho Knight
- Eggman Nega as Void Soul
- Mecha Sonic as Parallel Woods
- Sleet & Dingo as Parallel Twin Kracko
- Perfect Chaos as Parallel Big Kracko
- Silver Sonic as Parallel Meta Knight
- Metal Knuckles as Parallel Dedede
- Neo Metal Sonic as Corrupt Hyness
Bosses (Story Mode)[]
- Zavok as Whispy Woods
- Knuckles as King Dedede
- Shadow as Meta Knight
- Scratch & Grounder as Pon & Con
- Rouge as Francisca #1
- Wave as Flamberge #1
- Breezie as Zan Partizanne #1
- Zavok & Zazz as Whispy Woods & Yggy Woods
- Decoe & Bocoe as Goldon & Silvox
- Zenna as Grand Mam
- Rouge as Francisca #2
- Master Zik and Orbot & Cubot as Kracko & Twin Kracko
- Wave as Flamberge #2
- Breezie as Zan Partianne #3
- Metal Sonic as Hyness
- Dr. Eggman/Dr. Robotnik as Void Termina (Final Boss)
Bosses (Guest Star Mode)[]
- Mephiles as Galacta Knight/Morpho Knight
Bosses (Heroes in Another Dimension)[]
- Mecha Sonic as Parallel Woods
- Sleet & Dingo & Perfect Chaos as Parallel Twin Kracko & Parallel Big Kracko
- Silver Sonic as Parallel Meta Knight
- Metal Knuckles as Parallel Dedede
- Neo Metal Sonic as Corrupt Hyness
- Rouge, Wave and Breeze as Three Mage-Sisters (Final Boss)