Krookodile is very helpful for Caitlin and Shauntel.
Use something like a Mienshao, Emboar, or a Scrafty for Grimsley. (Krookodile with Brick Break or Samurott with Revenge wouldn't be bad either).
Use Unfezant or Braviary for Marshal.
yes you can only after you beat the elite 4
Finish Victory Road
what do you mean the elite 4 are in the Pokemon league in evergrande city you should be able to beat them if you have good Pokemon
First you have to migrate the Pokemon to diamond(have to beat elite 4) Then you trade the Pokemon to Pokemon white
you could only get new Pokemon in black and white intill you beet the elite 4
Yes, but first, in white, you must defeat the elite 4.
try going in the elite four with Pokemon lv. 60-100....
You can't catch Dialga in Pokemon White. After you beat the the Elite 4, you can use the PokeTransfer to receive a Dialga from Pokemon Diamond, or Platnium.
in the giant chasm after beating the elite 4
i have no idea what is ZEKRAM. But, u get ZEKROM after you beat the elite 4
Nimbasa city sports Dome:Small/Big Court. Keep Challenging the Elite 4 to get the REALLY good exp if you can't win the first time.
get a bunch of Pokemon lv 50 and above