Things You'll Need
Instructions
Place "Pokémon Pearl" into your Nintendo DS and turn on the game.
Go to Solacean Town and navigate your trainer toward the house at the right side of the Pokémon Center.
Walk toward the character standing beside the house and capture the Pokémon needed for the mission. Save your game data.
Walk toward the same character standing beside the house and show him the Pokémon you captured. He will reward you with one of the many different Pokéballs. If you don't receive a Master Ball, turn off your DS and repeat.
Repeat process until you accumulate all the Master Balls you wanted.