Bowser is a playable fighter in the All-Star Versus series. He is playable in all six installments. He is also the main villain of the Mario series.
Claw + Bite
Supercharged Attack: Bowser Finale. Bowser charges up a massive fire breath that covers most of the stage.
Costumes: Original (Mario Sunshine) and SSB alts.
Bowser also appears as a veteran in Smash Bros Ultimate
Standard Special: Fire Breath
Side Special: Bowser Slam (can be swapped with Grab Bite)
Recovery: Bowser Spin
Down Special: Groundpound
Final Smash: Giga Bowser