The Lustrous Orb is an exclusive item for Palkia. While being held by Palkia, its Dragon and Water type moves increase in power. In Pokémon Pearl, the Lustrous Orb can be found behind the platform the player fought Palkia, at the back of the Spear Pillar ruins. In Platinum, it, as well as the Adamant Orb, can be found in small cave within Mt. Coronet only accessible via waterfalls. In Pokémon White/Black it can be obtained from the Shadow Triad on Marvelous Bridge after the story's completion. In Pokémon Black 2 and White 2, it can be found in Dragonspiral Tower, along with the Adamant Orb and the Griseous Orb, on the floor just before the player can catch Zekrom/Reshiram.
Stub!
Please help the Pokémon Wiki by adding more info.