I don't wanna brag... but I know a lot about Mario. However, I can concede the fact that whoever runs Supper Mario Broth knows a great deal more.
SMB is a
twitter account and
blog focusing on Mario Obscura. The most minute, unknown, and ridiculous bits of Mario trivia are catalogued. This goes far beyond knowing the punching ghost from NSMB's name (Broozer) and SMB manages to dig up unused textures, forgotten art, and general absurd information that no one, ever, would think about.
WHO WOULD EVEN KNOW THIS? OR WANT TO KNOW IT?
SMB also manages to dig up a lot of forgotten art from magazines all over the world as well as texture dumps and unused files.
Any fans of Mario or absurdity in general should definitely check SMB out. I have no idea where this stuff comes from, but I am living a better life after knowing DK's motto according to the DKC2 trading cards is "I have but 99 lives to give to my country.
Post your favorite Mario trivia, or recommend fansites that discuss the more obscure bits of a franchise.