While playing Magicoal, I tested out its MB128 compatibility. Either there's something wrong with my MB128 (doubtful), I'm f*cking it up somehow (quite possible), or Magicoal doesn't support it very well (most likely).
When attached, load and save can only see the MB128; the system's saves are only accessible when using 'copy', where you can swap individual saves back and forth between system and MB128 (three on each). I could successfully save to the MB128 and swap games both ways, but loading from the MB128 led to a black screen of nothing. Do any of you guys have Magicoal and a MB128 that can test it out and corroborate?
P.S. - Thanks again to le Ope for ze MB128.