Talk:Professor Oak/@comment-33081060-20180218141759/@comment-33606670-20180218184250

You are indeed correct, when you get 550 Pokedex entries you go to the PokeCenter in the Mausoleum of Origin and he will be there, you talk to him and then you can select if you want Mewtwonite X or a Mewtwonite Y. It is possible also to trade the stones so if you want both stones you can try hunt down someone with the other stone and ask for a trade