Pokemon Crystal Clear is a hack of Pokemon Crystal. By getting so bored from the original game because it is so easy, the author of this hack created his own game with more difficult challenges ahead.
Pokemon Serpentine is a game created from RPG Maker XP and included five different regions with the Pokemon Essentials pack.
Pokemon Extreme Silver : Watch out, Lugia The Guardian Of The Sea is going to be back in a hack of Pokemon Silver named Pokemon Extreme Silver! This story takes place in Johto four years after the GSC case.
Pokemon Daia : If you have known Pokemon Gaia from PokeCommunity, Pokemon Daia (a hack of Pokemon LeafGreen) is a weird hack which became a troll version of it.
Pokemon Mint Fantasy aimed to be a classical fan-made game by using RPG Maker XP, but actually it is a modern one of these days. Check it out. Welcome to Pocket Monster Mint Room! Pokémon Mint is a game in which I have been working for 4 years.