The emulator solution is too long and it can cause problems, like wasting your time, so I wouldn't bother doing that.Don't know if anyone else has encountered this, but my game freezes after the first round of the Driftveil tournament, right after you defeat your rival. I'm on Supercard DStwo using an AP patched rom.
I'm having this exact problem as well (all DSTwo users seem to be). I've been reading in this thread that the fix is to use an un-patched ROM on clean mode for that part of the game. The problem is, I just get a white screen after loading the game when using those settings. Similarly, I can't complete this portion of the game using an un-patched ROM on patch mode since the game freezes whenever I exit the party screen, including after I select the three Pokemon to use in the tournament.
If anyone has a solution for this other than copying your save file to your computer and completing this part on an emulator, please do tell.
My brother suggests you need to contact or e-mail SCDS2 and see if they have a fix for it.. Or probably some setting in the Properties of SCDS2 will fix it. I never used one before, but this is what my brother and I suggest. As his friend with a DS2 is encountering the same problem.