Pokemon Mystery Dungeon: Red/Blue Rescue Team – 2005
While the traditional Pokemon games have been monsters when it comes to sales, this spin-off wasn’t so hot. In this series, you play as a Pokemon, and you’ve got a rescue team that goes through dungeons to rescue other Pokemon. As a concept, it’s pretty novel and kinda dark, and the gameplay for the most part is decent.
Where it starts to falter is that it’s an incredibly unfair game at times. The dungeons were incredibly long at times, and you’d get attacked by enemies with secret boosts in stats that’d take you out in one hit, or you’d get attacked by multiple Pokemon at once.