Mario & Sonic Guy
Old rivalries live on!
Fyrus appeared in the Legend of Zelda: Twilight Princess. He was actually one of the first bosses to be revealed for that game.
Anyway, if Fyrus is to be used in Brawl, he'd likely be a boss for the Subspace Emissary.
As a boss, Fyrus would attack by smacking you with his chains. He may also unleash a blast of flames along the way. Fyrus' head is his weak spot, so you'll have to focus all of your attacks on the head if you expect to deal any damage to him.
Fyrus goes down for good after he takes several beatings on the head.
Would Fyrus work good?