In conjunction with Pokemon Ultra Sun & Ultra Moon looking like some of the biggest Pokemon Games ever to be released, The Alola Region Pokedex is also growing in size to better fit this expectation. Back in Pokemon Sun & Moon, players had to find roughly 300or so Pokemon to complete their Alola Region Pokedex. But not, players will have all the more daunting task over finding and catching over 400 to complete this same goal in Pokemon Ultra Sun & Ultra Moon (the National Pokedex is also growing in size due to New Pokemon Species being introduced). On top of this, Version Exclusive Pokemon will continue to persist between the two games.