trust me u dont know training till u do olimar. you have to memorize 3 different things for 4 (or 5) different pikmin. u also have to be able to know quickly each strategy u do based on the next pikmin(s) u will use.
I dunno. Only char I've played on Brawl is DK, so I guess I'm biased in that respect. But I played with all the chars in both other games, and DK was my favorite, hands-down. First because of the KAMIKAZE ATTACK Z0MG that my friend's older brother developed involving grabbing your opponent and jumping off of the edge, throwing them at the last second to ensure a KO to cancel out your SD... ah, many a month was spent perfecting it, but it was worth it in the end. Got me hooked on DK, and now it's a last-ditch effort when I"m already at 400% damage, or a "I win and you can't stop me" gloating tactic.
Pitt is pretty good, I especially hate is little arrows he shoots. His recovery move great, but it is just that- a recovery move; it can't do any damage at all.