I've mentioned it a few times here and there I think but haven't made a topic, so just so it's more "out there"...
Back in around 2001 or so, I found a Japanese website that talked about MD pirates, among them Pokemon Stadium and Kirby's Super Star. Back then, Pokemon Stadium wasn't known at all, but eventually the HazeMD emulator came out and suddenly it was dumped, which reminded me of that website and seeing a supposed Kirby's Super Star also existed. So with that I've gone all this time now assuming that this game does really exist, it's just super rare. But I've yet to find any proof of it at all, besides someone else I know saying he also recalls hearing about it, and even having someone send him a pic of it, though I've yet to get him motivated enough to try to see if he's still got that pic anywhere. I'll try asking him again right now...
Anyway, this is all basically just to make it more known, since I don't know how many people have ever seen me mention this supposed game. For all I know it doesn't exist. If anyone has any contacts or anything, make sure to let them know =p Also keep an eye out yourselves. Bet if it does exist its probably a titlescreen hack of something, but you never know.
Wish I could find the website, but it's probably long gone. All I remember is that it had a pinkish background and I always found it by doing a search for Donkey Kong 99. Probably was a geocities site. If only I knew how to find it through archive.org again :/