Pikachu and jggilypuff are among the best fighter's on the game for they're types, though i'm not that great with them myself, they are good fighter's with players experinced and that like they're stlyes. Though jggilyuff is a secret character, he is easy to unlock. aslong as you are a good fighter, you can unock him easlily. Pikachu is one of the normal character's. His third jump(If you know how to use it right)Can prevent you from dieing even if you are about to fly off the screen. but as long as you are on your toes, you can beat this guy, even if an expericed fighter is controng him. Ness(Another secret character), link and captain falcon(Another secret character) will put up a great fight against him, DK could do it, but you'd have to be extremly good with him to do it, i'm talkin EXTREMLY good.