Upload your clean HeartGold ROM and the Sacred Gold .xdelta patch file.
: Pokémon that usually require trading now evolve via alternative methods, such as level-up or new evolution items. Quality of Life (QoL) Enhancements Speed & Performance sacred gold pre patched rom upd
Copy your HeartGold.nds file to a new folder and rename it to Clean_HeartGold.nds . This preserves the original in case you make a mistake. Upload your clean HeartGold ROM and the Sacred Gold