If those filenames don't make a difference then I don't know what will -.-
I've tried every combination I could think of regarding the files in \System\ & the Ocarina codes and I redid the roster file three times for good measure.. but still nothing. Anyway, if you (or anyone else willing to help out) need to the see the codes I'm using Jasonvalle22 posted them on page 461. It's three codes.
EDIT: one question: Are both Sc_selcharacter AND Common3 needed or just one? And if so, which one?
Delete everything and start from scratch using this tutorial.
Also if your using a higher than 2GB SD card or a SDHD card then that's the problem.