Okay, I'm REALLY glad this has been revived because I would love to participate.
First off, I have Super Mario World and Super Mario Bros. 3 (many thanks to mew22!) on the VC so any help AT ALL that's needed in those areas, I can assist.
F-Man's right, Fire Mario just loses his ability in SMB3.
If you guys need any help, let me know. I'd love to help you all out.
Also, if I'm not mistaken, Galaxy has some timed challenges, reminiscent to that of Sunshine. But I can't testify to that (i.e, there may indeed be a whole mode/option for TA's that needs to be unlocked or something) but in your eyes, should Galaxy (or Sunshine for that matter; I forget the verdict on it) get added?
So far, though, what's the game list?
SMB2 Lost Levels
Shouldn't MVDK2 get added also if someone can test it out and whatnot?
If there are any discrepancies w/ MVDK I can help there also.