They were onto something, and then it just imploded. Olimar is pretty good if you can use him. Same with Meta Knight.
MK isn't inherently overpowered (well at least not nearly bannable). Unless you know how to use a character, you're not going to win many battles. I'm trying to get better with MK, and my friend can easily kick my ass with Marth, Wolf, even Sheik.
Gee, it sure is boring around here. *rolls eyes* LPing Zelda Oracle of Seasons, F-Zero GX, and a bunch of glitch videos: http://www.youtube.com/user/peteyboo