Developers even replicated the visual sprite flickering found in 1980s software. Brutal But Fair Difficulty

If you need help finding legitimate sources or troubleshooting legal emulation of Mega Man 9 (e.g., dumping your own WiiWare purchase), let me know.

Capcom made a risky decision with Mega Man 9 . They chose to mimic the exact limitations of the Nintendo Entertainment System (NES). Authentic Retro Design

Do not ask for direct links in forums. Instead, search for "Dolphin Emulator NAND guide" or "How to extract WiiWare from a real Wii."