Abilities? Plural? Far as I'm aware from every game up to Mutant/Titans (the ones everyone wants to forget anyway) he just spins, and that's it. It's a single move. Other than that he just runs, jumps, body slams, and has a weird fruit bazooka. No superpowers to speak of. Just a dude who spins and is good at platforming.
Again, not saying I wouldn't love him to be in Smash--in fact he's one of my top guys, personally. I'm just acknowledging that he's a far cry from the most interesting character in terms of powers/abilities.