Collect all 180 Emblems to unlock the following hidden Multiplayer characters.

Racing: Hero
Sonic
Space Sonic
Amy

Racing: Dark
Shadow
Space Shadow
Mecha Sonic

Shooting: Hero
Tails
Space Tails
Choa

Shooting: Dark
Eggman
Space Eggman
Big

Hunting: Hero
Knuckles
Space Knuckles
Tikal

Hunting: Dark
Rouge
Space Rouge
Chaos