Hey, literally made an account to ask about this ebay listing. I've never seen a release that looks like this. Could this be an early, pre-launch mock up type deal?
Couldn't find any info or carts that resemble this, so maybe y'all would find it interesting. This thread is easily the most recent resource I can find right now.
https://www.ebay.com/itm/Hokuto-no-Ken-Fist-Of-The-North-Star-BLACK-BELT-Rare-Sega-MASTER-SYSTEM-NTSC-Htf-/233399085730