Taboo (Tabuu)

Note: I know the this guy doesn't appear in any sonic game, but I though you should know the bosses from Super Smash Bros. Brawl since Sonic is appearing as a playable character. I don't have very much info on this boss, so I'll put in what I can and put more in later. You can battle this boss as anyone in Boss Mode of the game (You must unlock it first though)
1P's Character: All (you choose five[six if no 2P])(You must of picked up their trophies in order for you to choose them)(Wolf, Toon Link, & Jigglypuff can only be chosen for this fight when you beat the game once and defeated them in the hidden doors on The Forest area, The Ruins area, and the Swamp area)
2P's Character: All (can be any of the other characters 1P didn't choose)(You must of picked up their trophies in order for you to choose them)(Wolf, Toon Link, & Jigglypuff can only be chosen for this fight when you beat the game once and defeated them in the hidden doors on The Forest area, The Ruins area, and the Swamp area)