So this was posted to a retro video game group on facebook. The OP said they gave out this "prototype" back in the day, but another user mentioned that there's no mention of it on Nintendo's website.
Another user replied that they just updated it 10 minutes ago and they might need to clear their cache lmao
I mean, very clearly it's fake. The badge in the lower right of the label -- which is usually the Nintendo seal of quality -- even actually says "fake" if you zoom in. Plus, a prototype wouldn't have an ESRB rating, nor a quality seal.