This is through the use of the Adamant Orb, a held item that only has utility in powering up Dialga’s Steel and Dragon-type moves. Other Pokémon won’t have their moves of the same type powered up in any way. To find the Adamant Orb, players won’t have to look far in Pokémon Brilliant Diamond and Shining Pearl.
Finding the Adamant Orb in Pokémon Brilliant Diamond and Shining Pearl
The only step you need to take to find the Adamant Orb in Pokémon Brilliant Diamond is to battle Dialga. This happens after you ascend to Spear Pillar, battle the Team Galactic Commanders and Cyrus and then take on Dialga. Naturally, you’ll want to save before battling the Legendary to ensure you have as many chances to catch it as possible.
You can use a Master Ball to shorten the process but Dialga has a higher catch rate than most Legendaries. Once you’ve caught the blue dragon, you can head back to talk to Professor Rowan. He will eventually bring you to the mouth of the cave that exits Spear Pillar. From here, you want to enter the cave and then immediately turn back around to go back to Spear Pillar.
Now, all you need to do is run past where Dialga was and down the stairs at the back of the area. The Poké Ball there contains the Adamant Orb, which you can give to Dialga to hold from your bag.
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Featured image courtesy of Nintendo/The Pokémon Company.