Sorry dude this isn't possible. Unfortunatly your stuck with the name you first gave it. I gave one of my pokemon a rubbish name and now im stuck. Sorry :(
no i don't think so
castelia City
yes when you are in the professor's lab
No.
He is in a building just in front of Castelia City's northern exit.
Go to Castelia City toward Route 4. Just before you get to the enterance thing, there is a building on the left. Go in there and talk to the old man.
not, you have to wait until the next day to change the swarming Pokemon and its route.
Some where there is a guy that you ask then he will change the Pokemon's name, he is in a house some where.
yes
name rater
You cannot change the language of Pokémon Black 2.
tornadus can only change form in black and white 2, not black and white.