Select your "TrashMan" ROM as the base file and the hack's patch file as the update.
Given the confusion around the year and the specifics of your request, I recommend focusing on legitimate sources for Pokémon games and considering the community-made hacks and ROMs if you're looking for something unique. Always prioritize legal and safe methods to obtain game content.
This version is widely considered the for playing Pokémon Emerald on emulators or creating ROM hacks for several reasons: