Based on what I see online the ultra games seem to be a “alternative timeline” version of the og games more or less same story but with a new location and some new characters Someone who is better informed at Pokémon will have to correct me on this because I just used google
It's set in the same world as the other games however, you get to fight previous team leaders from the other games but they come from alternate dimensions where they succeeded. So you fight cyrus where he had actually took over the world.
