Like its predecessor, Super Mystery Dungeon is a dungeon-crawling rogue-like role-playing game featuring 3D characters and environments. Players assume the role of one of 20 Pokémon (which include all 18 starting Pokémon from all six main series generations, along with Pikachu and Riolu),[5] who is joined by a partner, chosen out of the remaining 19 Pokémon, who accompany them in their journey through procedurally-generated dungeons filled with enemies and traps as they help stop a major crisis and save the Pokémon world.[6] The game features all 720 released Pokémon at the time of release.[5]