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!