Things You'll Need
Instructions
Play through the storyline in "Pokemon White" until you reach Castelia City. Locate the building on the west side of the road that leads to Route 4, and talk to the man on the 13th floor. He will ask you for a password.
Tell him the correct password to unlock the Relocator. The upper-left answer is Everyone, the upper-right answer is Happy, the lower-left answer is Simple and the lower-right answer is Connection. You will now be able to use the Relocator whenever you like from the main menu.
Insert your copy of the Generation IV game that has the event Celebi into another Nintendo DS system. It does not matter what type of Nintendo DS system you use, as they are all compatible. Turn on the system, but do not start the game.
Open the Relocator program from the main menu of "Pokemon White." Your Nintendo DS will automatically search for the other DS and send a DS Download Play request. Open the DS Download Play option from the system menu on the Nintendo DS that has the Generation IV game inside, to accept the request and download the software.
Follow the on-screen instructions to transfer Celebi from the Generation IV game over the "Pokemon White."
Load your saved game on "Pokemon White" and put Celebi at the front of your active Pokemon party. Talk to the girl standing on the first floor of the Game Freak building in Castelia City, and Zorua will reveal itself to you. After the scene is complete, Zorua will join your team.