As long as you own a legitimate copy of the game, modifying your personal emulation is perfectly legal in most jurisdictions.
Copy these lines into a text editor and save the file with a extension (e.g., [CRC_CODE].pnach PNACH Code Functionality Infinite Health Modifies memory address for invulnerability. Infinite Items Modifies memory address for unlimited inventory. Modifies memory address to maximize currency. One Hit Kill Modifies memory address to defeat enemies instantly. Infinite Jump Modifies memory address for unlimited jumps. shinobido way of the ninja pnach free