Pokemon Brilliant Diamond and Shining Pearl How To Get Genome Slate
- First, obtain the Explorer Kit.
- From here, go to the Grand Underground.
- While mining, you have a rare chance to obtain Mysterious Shard L and Mysterious Shard S. You can exchange these at Ramanas Park for the Genome Slate.
- After you have taken the slate to the correct pedestal and placed it, you will be able to begin an encounter with Mewtwo Legendary Pokemon.