Cheren is in the last room of Victory Road before going to Victory Road.
(Meet him on Route 5 first.)
Bianca is in Professor Juniper's Lab. (I think after beating Alder, I'm not sure)
Bianca
Beat the Pokemon league!
at the Pokemon league
SHE MEANS TO GO BACK TO FENNELS HOuSE.
She will. At Route 2 , Route 4 Gate , Driftveil City , Route 8 & Juniper Pokemon Lab
I believe she goes to Nuvema Town, that's where you can battle her
Bianca
Bianca gives it to you
You get it in Narcene city from Bianca
Black, Cheron, and Bianca are 14 in the manga. White's age is yet to be revealed.
Pokemon Black and Pokemon White are the official names.
in your own room,after that you have to battle both bianca and cheren
You of course no, you, bianca (bel), cheren and maybe N
After you finish the game (completely) go to Professor Juniper's lab and Bianca will be there. Talk to her and your ready!
After beating the Nacrene City gym
After you beat the 5th gym Bianca, she will give you the HM02 Fly
at the Pokemon league