Donkey Kong is the slowest of all the Smash players, but this doesn't make him an easy target.  His big monkey hands tend to bitch slap things around.  His over and A smash attack is one of my favorite, just to watch the other characters get slapped like nothing else.  Donkey Kong has an incredibly powerful B attack.  Just charge up and let the punch fly.  A good hit spells Doom with a capitol D for the enemy.