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.
Late to the party, but you may want to try Pokemon Reborn. It gets mixed reactions from players because its writing is considered edgy, but I do not mind the occasional drama and dark undertones. The added mechanics, field effects, branching storyline based on relationship choices, 18 gyms, Pokemon from generations 1 - 7, and so much more quality of life additions make it interesting and challenging imo. Bonus: It’s completed!