Pokemon Legends: Arceus is one of the most well-received games in the history of the franchise, and part of its success has to do with how it changes the classic formula of Pokemon games. Despite the fact that Pokemon Legends: Arceus changes a lot of existing systems from mainline titles in the series, and that it also introduces new concepts that could very well become staples of the series, it also reprises mechanics like regional forms and additional evolutions. For example, the starters of the Hisui region all have Hisuian forms for their final evolution, and so do many of the noble Pokemon in the game.