Preferably one that's not a rom hack, though I dig those too. I'm looking for something a bit harder than the originals and maybe a bit more mature, but still fair and whimsical. I'd like a game with pokemon from as many gens as possible, and fakemons are fine too.
Pokemon Eternity https://discord.gg/TZWNXrxK
More mature, traditional mmorpg style questing, real time battles against NPC's, wild pokemon, and other trainers.