You need to catch a Pikachu in the Viridian Forest holding one. Pikachu rarely hold this item, though, so you'll have to catch a lot!
You can also receive a Pokemon from trade holding one.
You need a second DS and a second pokemon black or white game
The only way to obtain a Light Ball is by going into Trophy Garden and encountering Pikachu. (They may hold a Light Ball) If one of your Pokemon knows Thief or Covet, you can take the Light Ball from Pikachu. There's only a 5% chance that a wild Pikachu will hold a Light Ball so it my take a few tries.
you can trade a Pokemon from black or white holding a master ball.
White Apricorn : Fast Ball Green Apricorn : Friend Ball Black Apricorn : Heavy Ball Red Apricorn : Level Ball Pink Apricorn : Love Ball Blue Apricorn : Lure Ball Yellow Apricorn : Moon Ball
Pikachu learns Electro Ball at Level 18.
Throw a Master Ball at it.
Get a wild pikachu after you beat the elite four and there will be a 75 percent chance that your pikachu will be holding a light ball.
There is no Light Ball item in Pokemon Yellow.
Catch a bunch of pikachu's in the safari zone then check to see if one is holding it.
You need a second DS and a second pokemon black or white game
you use 1 master ball if you use action replay or you can let a Pokemon and trade it with the master ball. Don't listen to the kid on the top.........you cant trade a Pokemon that's holding an item from Soul Silver or any of those games to the white or black version.
Zekrom, and the best way to catch it is to keep your master ball and catch it that way, cause that's how I did it.
Use it on Palkia.
You catch them with a ultra ball
the master ball is for zekrom in white and reshiram in black
pikachu with light ball is better
there is no item like a mater ball.