Alright. Well, it's basically Lucas and Ness yelling PK Starstorm at the same time. D: I don't know about you, but I fangirl screamed.
It was just so epic to watch / hear.
[link] Skip to 1:10, if you'd like. The whole video is basically everyone's final smash being done at the same time. :< Well, not exactly EVERYONE but, some people. :3 I hope you don't shoot me.