The Pro. Fighter X was released in 1994 by China Coach Limited(CCL). This copier was a modification of the Double Pro. Fighter with the Sega Genesis parts removed and a few bios features standardized. It retained much of the shell and general board design, and can use the same detachable cartridge connector. It came in 24, 32, and even 64 Megabits and included DSP/CD-Rom support built in. It also supported the parallel transfer cartridge and later the Super Smart Card, which was a copier for the original Game Boy. The Pro. Fighter X supports the same rom files that the DB. Fighter supported, except for the Genesis specific files of course.

My Pro. Fighter X is a 32Mb variant. I believe it's a later model as the colors of the plastic shell pieces are consistent with the version that came after the launch model but before the Super Smart Card support. Mine does however have rubber feet to stabilize the unit on the American/Canadian SNES so it most likely came from a western importer.

Sources:
https://videogamedevelopmentdevices.fandom.com/wiki/Pro_Fighter_X
https://magicom.org/