I like using:
Fox (The Firefox is the best move! Also the deflector helps.)
Pikachu ( I beat Event 50 without dying once. I used thunder jolt, then skull bash, then the C Stick and then thunder)
DK ( Charge up punch, knock into opponent into ground, grab and hit opponent, when he lets go, punch away)
Mewtwo ( Charge Shadow Ball, confusion, another confusion, he flies back, then shadow ball and he flies off ther stage)
Kirby (the absorb opponent and jump off the stage trick, and all the jumps)
Almost an 8 year member! beat that