Following their E3 Nintendo Direct, the house Mario laid pipe for brought Super Smash Bros lead Masahiro Sakurai to the stage in their E3 booth to show off live gameplay of the upcoming brawler. Here's that part of the presentation, which starts with Wii Fit Trainer's unveil as a playable character.
Very soon after, Sakurai and company boot up another gameplay demo that featured a one on one showdown between Mario and series newcomer Mega Man. The match even goes to sudden death!
You'll have to watch to find out who wins though! We'll have more Nintendo E3 coverage over the next few days.