Chinese bootleg developer who specialized in hacking Famicom games in elaborate (and usually very surreal) ways with the intent of "legally" distributing them on plug and play consoles without the copyrighted material. A lot of these hacks are still surface-level in terms of their origin, being easily recognizable by those familiar with the system library and tending to mix and match assets from other Famicom games.
As shown below, they also dabbled in "original" works, though their hacks wildly outnumber them.