This is hack from Megaman X that was found in a Youtube video.
The greatest feature is the Zero playable with his hair animation. The hair animation can be improved (polished) as well the texts of the game (It uses the original texts).
All credits goes to Programer Peru. All in this hack is his effort.

Base rom: Mega Man X (USA) (Rev 1)
CRC32: ded53c64

Aply this patch using any ips patcher