Reputed by many to be nearly unplayable, Cheetahmen II was a video game produced by Active Enterprises in 1992, but strangely the game was never sold commercially. All 1,500 known copies of the game were located in a warehouse in 1997. All were reused Action 52 cartridges with some having a small gold sticker reading "Cheetamen II." The cartridge as you would imagine, is very hard to come by, though ROM images of the game exist on the Internet.
Review on Mobygames
Cheetahmen II for NES on eBay
Unfortunately the Seller ships to US only.