Yes, Pokémon in "Pokémon Black" can be sent to "Pokémon Black 2" however you cannot transfer them over, you will need to trade each Pokémon one at a time from Pokémon Black over to Pokémon Black 2.
You cannot find Raikou in Pokémon Black 2, it will have to be traded from another game or transferred from a previous game.
By Transferring the Pokemon from your Unova games. That is, unless you can convince someone to trade you theirs.
The Pokémon you don't catch will be transferred back to their original game, and can be transferred again.
Black Kyurem is in Pokemon Black 2.
Mew cannot be caught in black or white. It must be transferred over from another version.
Pokemon Black 2.
You cannot catch Arceus in Black or White. Arceus was an Event-only Pokemon from the 4th generation and must be transferred over.
No there is not a trainer editor in Pokemon black 2 or Pokemon white 2
If you are looking for Zorua or Zoroark, they can only be obtained in Pokemon Black and White, and they can not be transferred to other Pokemon Games.
4 because the sell pokemon white and pokemon black and know they sell pokemon white 2 and pokemon black 2
You cannot catch Rayquaza in Pokemon Black 2.
Zekrom. It is Pokemon White's mascot, NOT Pokemon Black's, as a common and logical error states BUT its vise versa in pokemon black 2 and pokemon white 2 so if u want to get a zekrom (advise: hes better) i suddegest pokemon black 2 but pokemon white 2 is a better game