Along with Toon Link and Ike, Both Pikachu and Jigglypuff are my main characters in the entire game. But i use Jigglypuff a little more. Jigglypuff is very slow, and has a pretty bad final smash. But I love to control the air with her. This also leads to me getting the smash ball nearly every time too.(Even if i don't get any KO's with it, it prevents others from doing so.) I never used her in past games, where her main niche was sleep(or at least I think so), but i believe she has improved big time in Brawl. She doesn't have an "Up+B" recovery, but she is still better in the air than Kirby. And her air kicks are great at finishing people off. I never use her sleep move either, it's all about air attacks(and a rollout here and there.)