The Legend of Knuckles: Emeralds Unleashed is a Sonic game for the Nintendo Wii, Xbox 360 and PlayStation 3 by Shroobz Inc. and Twenty-Second Choice. It'll feature over 44 playable characters and many alternate forms.
Every playable character in the game corresponds to a different Emerald, and that Emerald is also playable.
- Sonic the Hedgehog - Blue Chaos Emerald
- Shadow the Hedgehog - Green Chaos Emerald ("that damn fourth chaos emerald")
- Knuckles the Echidna - Master Emerald
The game's storyline involves all emeralds (Chaos, Super, Master and Sol) coming to life, and partnering with a corresponding Sonic character. For instance, Knuckles' counterpart is the Master Emerald (who happens to be female).
Each character has a unique gameplay, as well as a different one for their alternate forms (Knuckles' game play is more classic while Werechidna's is treasure hunting). There is also a Chao Garden in the game.
- There is a lot of shipping between Knuckles and the Master Emerald.