Pokemon Island
>>22397578 (quote contains link)The set up is that you're participating in a Colosseum challenge on the island from Pokemon Snap. There aren't any Gyms or evil teams, the focus is entirely on team building and increasing your battle rank. There are lots of cool features like key items replacing HMs, every trainer in the game being rematchable, training minigames, customizable music and menu, being able to evolve Unova mons earlier etc.