Favorite mainline Pokemon game is Emerald hands down. I had Blue and then Crystal and then for my 9th birthday I got Ruby. It blew my nips off. The music was better, the designs of the mons was peak, it had Pokemon from the first two games in it. You saved the world. It was just truly epic. Non-mainline Pokemon game would be Gale of Darkness. That game is just so much fun, the shadow Pokemon are great, music is killer, and the story is so fun.