Occasionally...Hmm, does it work when played from TWiLight Menu++?
I'm running the xenophobia dump, finished it twice in TWL++ sdNAND.Bad ROM dump, redumping may fix it
Already set to DS Mode...Some setting is wrong, iirc that game has issues in DSi Mode so make sure it's on default/DS mode. Card Read DMA or 133 MHz (TWL) ARM9 clock may also cause issues
I'm thankful to God for triple-check-format.SD isn't formatted right, if TWiLight gives an error about not being 32 KB clusters that could be the issue
I am truly sorry for the inconvenience...That's all I can think of really...