Gah, I've tried so many things! First I thought it was the koopa kids, that didn't work, then the flagpole at the end of smb, then the mushroom retainers. Then I got to thinking it was the lands inside the mushroom kingdom. No entry for that, so I look for the airship. Still nothing. I've forgotten all the other things I've tried :(
About the only thing I did find was that in the entry for toad, the link to SMRPG is incorrect. It links to
http://www.classicgaming.com/tmk/sm.html or something like that (It gives you a 404, so don't go thinking its the secret page ;) ).
Man, is it a link you can see, or is it coded to look identical to normal text?