What system is this controller for?

I picked up an old controller that reminded me of the classic SNES or Sega Genesis six-button controllers, but I haven't been able to ID exactly what type of controller this is. I'd appreciate your help to figure out exactly what system(s) this controller would work with. Thanks!

Solution 1:

It's a "Blockbuster brand" SNES controller. They're apparently very rare. Unfortunately there doesn't seem to be much information online besides that.

(forum thread this came from)

(Ebay listing this came from)

I found the first link by searching "snes fighting controller" and the second (after finding the first) by searching "snes blockbuster controller"

Solution 2:

Looks like a third party SNES controller.

First party ones look like this:

The port that it plugs into looks like this: