Something called a 'Tera Orb'- I was on the team of scientists that helped create it. As I said, only trainers trusted to be capable of handling the power are given one.

[The very last 'grand' project he was ever a part of.]

What it does is terastallize a pokémon, which is covering them in extremely strong crystal in a way that allows them to still move and exist normally, and turns them into a pure Type while increasing that Type's power. You can usually tell what the Type is by the crystal structure upon the top of their head as if it were a crown.