XD or Colloseum 3D
Pokemon 3D : Gale of darkness, Lady at reception counter gives out Bonsly,
Pokemon Colloseum 3D : Past and Present, allows time travel through certain points in the game, by using Islex Forest Shrine after Purifying all Shadow Pokemon, to capture Pokemon used by Cipher one year in the Past, where player meets XD character's Father, and 3-4 years in the Future, where Player obtains Aura Reader, Character and Rui both confused why the guy says they've met before.
Over 10 new Shadow Pokemon including Zoroark, Purugly, Stunky, Giratina, and XD442 Spiritomb,
XD002 Giratina Shadow Form anyone?
...Creepy.