Rarest Nintendo 64 Game Ever?

This is a very rare game variant for the Nintendo 64 that many people don't even know exists.. Could it possibly be the rarest N64 game that isn't an NFR? Only time will tell... Here's a video of the rarest Nintendo 64 game ever, and no one even knows about it....yet! Here's an informative video about this rare game http://www.youtube.com/watch?v=HOBJEzZkvgE