Pokémon Super Mystery Dungeon

The definitive Pokémon Mystery Dungeon! Prepare yourself for a grand
adventure where you become a Pokémon and battle alongside Legendary and
Mythical Pokémon to help save the world! Befriend Pokémon and explore
ever-changing mystery dungeons with them!

Players are suddenly transformed into a Pokémon and sent out to a world
inhabited only by Pokémon. From a group of 20 Pokémon, including the
starters from core RPG Pokémon games plus Pikachu and Riolu, you can
choose your Pokémon and your partner Pokémon! Battle alongside your
partner Pokémon, who will become your best friend as you investigate
ever-changing dungeons. Befriend and interact with all 720 known Pokémon
as you attempt to save the world from a crisis in a tale of
unprecedented scale! The possibilities are limitless!