The only way you can get all the Pokemon on Pokemon white is an action replay. but if you wait, you can get Keldo, Melloatta and Genesect in special game distributions
either you hack it or you unlock all of the areas and find every single Pokemon
pretty much every flying type
every single elictric type Pokemon
I doubt it, that's 5 regions and that's too much memory for a DS game. Maybe if a Pokemon game came out on the Wii/PS3/XBox, then maybe it could.
pretty much every single Pokemon except im no to sure about legendary Pokemon
Not Every Single one
go to serebii.net
You see every single Pokemon, Google this "How to see every Pokemon in platinum DS"
The fastest way is to collect every pokeon in dimond /pearl or platinum then transport every last one to black and white then collect every black and white native pokemon
you cant get every legendary of Pokemon without cheats or migrating and trading with people
Every single Pokemon except ones with no gender and legendaries.
Buy every game and find out.
Pikachu, every day, all the way.
in rare places they are every where in the grass
either you hack it or you unlock all of the areas and find every single Pokemon
You Have To Do Every Gym ANd Then Get To The Elite Four And Do The Champion. If You Want To Complete It 100% Then Get Every Single Pokemon Aswell(:
Battle Every Single Character in the Game to meet all the Pokemon in Pokemon Pearl.