You will need to find and download the specific patch file for the hack. This is usually provided in a common format such as .ips or .bps . The exact location of the patch can vary, and you may need to search for it on ROM hacking forums or dedicated fan sites.
Because the memory addresses are altered due to the added Pokemon and mechanics, standard Gen 3 Action Replay or GameShark codes will likely crash the game. Look for custom cheat codes provided specifically by the hack creator. download 18 pokemon pigment ruby completed exclusive