History
The Adamant Orb is a sphere made of diamond, an exclusive item for Dialga. It boosts its Dragon and Steel type moves, but only for Dialga. In Diamond, it can be found behind the location where the player fought Dialga, at the back of the Spear Pillar ruins. In Platinum, it, along with the Lustrous Orb, was found in a small back cave in Mt. Coronet only accesible via waterfalls. In Platinum it can summon the legendary Dialga.