Don’t think this is gonna be a 100% Gold Remake, it’ll have its differences. Extra battles (some’ll be optionals, tough but rewarding), Hoenn Pokemon (in every area, and hard to find) New areas, Remapped some dungeons (so your old guides wont work) , Extra recurring characters (some’ll hate you, some’ll help you)
Note that the hack is incomplete but feel free to enjoy the hack as-is.
Just released is this awesome patch that lets you gain access to Metroid Fusion's Debug mode! Debug Mode allows you to turn anything on/off in Samus's arsenal at your leisure, and more like giving yourself access to any Level of doors at any time. To access the mode, after you start a new game and go through the first (unskippable) cutscene, push Start to bring up your subscreen. Then press R to access the Debug Menu. A button selects and B deselects. Use the Dpad to adjust numbers and move the cursor. Try as many different combinations as you want. For example, selecting "SAMUS: 18" and pushing Start gives you a full arsenal, including 254 Power Bombs! Have fun!
