I just tried it and it didn't work. The only improvement is that instead of freezing up at the start screen when you hit confirm for names, it gives you 0.5 seconds of looking like it'll transition into the cutscene and THEN freeze. Not much of an improvement since the game is still unplayable.
I tried it from your source (wasn't easy since I had to get a translator) and from here http://filetrip.net/nds-downloads/f...mpgba-mod-for-supercard-dstwo-1-0-f33430.html (I had to get the BIOS from the original tempGBA to get that one to work) and neither helped.
Edit: I just tried a european ROM to see if it would work better (I'd rather have the version of the game from my own area but whatever >.>) and same issue, either the fix only works with the japanese version of the game (which I can't find) or someone didn't do a very good job testing it.
Edit2: I dug in the config I downloaded and this game isn't even listed in that config, I looked through the Gs expecting to get to the H section but it skipped right to the Ks so someone obviously forgot to include it I guess. :l I tried ctrl+F to find it as well and it isn't in there.
Yeah, I was going to suggest trying the Euro rom. It looks like you have explored all avenues. Not sure what is going on with the H section in that modded config. Noticed the Hudson collections are missing from it. All I can suggest now is running it via slot-2. Used DS Lites are cheap enough these days.