Premier Ball Snover is cute - it loses leech seed though...which is kinda nice for hail stallers
Something Ball Piloswine/Ursaring(if you can)/Kricketune - ooh, I don't think I've "ever" seen a caught Piloswine on Smogon (Swinub). Ursaring...maybe not...since you lose out on Cross Chop and Close Combat. Kricketune...just for kicks, lol.
Dive Ball Finneon/Golduck/Cloyster/Wobuffet are nice too :o Everything Dive Ball is nice though I guess, ahaha. With the Cloyster...losing out on Rapid Spin AND RockBlast egg moves is too bleh, but it'd look nice. Wobuffet is a total copycat of Eppie...lol, but oooooh :P
Fire Ball Magmortar! lol...it's probably best on Premier Ball imo...though he's kinda hard to pick a ball for maybe.
Heal Ball Medicham/Chingling! Yesh! The latter is just too cute! The former is just nifty methinks ^^
Afraid that I'd go over my limit. If you don't like those ideas, I bet I have more pokemon ^^