How do you get Celebi in Pokemon pearl version?
You must trade it from a 3rd gen game.
Celebi is not available in Pokemon Diamond and Pearl. You would need to use a Japanese bonus disc from Pokemon Colosseum and transfer it from Pokemon Sapphire, Ruby, or Emerald to the Pal Park in Pokemon Diamond and Pearl. You can also use an Action Replay, but commonly it can damage the game, so I suggest being careful using this.