Board Thread:Fun and Games/@comment-25814498-20160613144119/@comment-48285-20160831230012

Ban Alex because all you need to know is that you need to travel to Sinnoh in order to meet the ruler of time.

(Or you could travel to Hoenn in the Mega Evolution timeline and fly around on Mega Latios/Latias in search of Hoopa rings that allow legendaries from other generations to come through, but that's a little more complicated.)