@ Raven - Sorry about the ability. I didn't pay enough attention and saw cubachoo's DW ability which is rattled. It changes to Swift Swim when it evolves. But since you can't get a DW cubachoo without some luck, it is possible to get one in the hidden grotto. I will have to change the challenge. Also in B2 it is the only ice type at that stage in the game, in the original BW there are more ice type's.
I also thought of another way of getting an ice type but it would involve trading and I don't know if you have the ability to do that. It was to catch an eevee and trade it over to someone else with a rare candy and have them evolve it to a Glaceon and trade it back.
As for Cubachoo i'll redo the challenge - Still nickname it Winter. It must defeat 3 fire type pokemon with a ice type move to evolve.
you can keep the joltik challenge if you want it's up to you.
3DS FC 0877-2062-2004
Friend Safari: Aipom, Kecleon, Chansey