This evolves from ditto lol Evolution method: Friendship MAX, Evolve time dusk, Use Mystery stone (Can only be obtained by spending 1 million pokedollars in one market on the 2nd-to-last route). (Or you could find it in the wild in the last route of the game- XD, but it's catch rate is 5% with TECHNO balls, 4% with ULTRA balls, 3% with great balls, 2% with poke balls, and 1% with any other ball NO MATTER WHAT. It's catch rate is 100% with master balls tho- )
This mon is OP, but is VERY VERY VERY hard to obtain and has a lower catch rate than some LEGENDARY pokemon lol