Why are so many people so hesitant to put a Tekken character in because "it wouldn't fit"? Snake is an obvious standout in the cast, but I'd say he works pretty well. Heihachi is comfortable standing alongside a rapping dog soooo... Why not Smash? Granted I'd rather have Yoshimitsu as he represents more of Namco than does Heihachi. Plus I think he's translate better to smash.
Up Special: Helicopter with his sword
Down Special: Meditate-he regains health while he stays meditating. Hitting special again will leave the stance, hitting A will have him do kangaroo kick, smashing forwards would do the spinning thing, smashing up would do the flippy slice, and pushing the stick to either side would teleport him that direction.
Side Special: Slap You Silly
Neutral Special: Harikari- he stabs his sword through himself, dealing damage to himself but also huge damage/knockback to someone immediately behind him.