You can't catch any starter pokemon in any pokemon game. But you can trade them online via GTS.
No.
No
Yes
The Starter Pokémon in Pokémon Black 2 and Pokémon White 2 are Oshawott, Tepig and Snivy.
you cant, 2 have bulbasaur, you have to of got it as your starter
No, you do not get to pick new Starter Pokémon in Pokémon Black 2 and Pokémon White 2, the Starter Pokémon option that Bianca provides you are Oshawott, Tepig and Snivy.
you catch them
can you TRADE for a pansear on POKEMON WHITE 2!
Yes
Technically, no. You don't catch White Kyruem. You catch Kyruem and catch Reshiram. Then the two merge together.
Catch kyurem,catch reshiram, and fuse them with the dna splicers
Imposible.............. Possible with cheats but, you can get it in pokemon black and white 2