The Wonderful World of Pokemon: Trial of the Hanged Man : Maybe this is the first Pokemon fan-made game ever from RPG Maker XP which connects directly to Google Translate system.
Pokemon Mundo Perdido (Lost World) is a slightly different Pokemon game, which is made from RPG Maker XP.
Pokemon Luola is a good hacking project of Pokemon FireRed that has been started a long time ago.
Jupiter’s Shadow: a monster-collecting game : From two of his favorite games which are related to the monsters capturing, the author has created Jupiter’s Shadow for the PC platform with the support from the RPG Maker XP tool.
PokeScape is a hack of Pokemon FireRed which let you become a new Pokemon Champion of the whole world.