Doing that would make Mirage Island lose its appeal in my opinion, not to mention any sort of challenge there would be to getting there. While the odds of seeing Mirage Island in RSE was far too high, there was at least a looming mystery of the island and challenge to getting there. If we had a Pokémon like Celebi who could just take us there any time we wanted to, then it just becomes a regular location like any other town or city.If they do put something like this they should put a Celebi on it with a move that lets you speed up time so you could go to mirage island any time you like to