In my opinion, I always goto the elite four (aftergame) and replay them. You can also goto the east side of Unova and fight wild pokemon.
Defeating Pokemon that are a higher level that it, or Rare Candies.
To evolve Mantyke in pokemon black/white 2 you have to level it up with a remoraid in your party then it will evolve into mantine
there is no way, all you have to do is the slow boring way. sorry
Level it up to level 50, then it will evolve into Zweilous. Level it up to level 64, to evolve it into Hydreigon.
cheat
try rare candies
In my opinion, I always goto the elite four (aftergame) and replay them. You can also goto the east side of Unova and fight wild pokemon.
To get a Pokemon level up quickly is to have a Pokemon hold exp. Share and then just battle a bunch of trainers or wild Pokemon.
Dark Cry? There is no such game. I belive you mean how to level up the Pokemon DARKRAI. Correct?
If you have the Exp.share give it to your Pokemon that you want to level up then go to beat the elite four and the campion
you should give it a lucky egg and put it at the front of your party while you face the elete 4
By giving it rare candies :)
keep battling Pokemon and people
Pokemon evolve when you level them up to a certain level, by trading them, by friendship, or by using stones.
Defeating Pokemon that are a higher level that it, or Rare Candies.
you level it up 50