Never mind.
Since I added the piracy fix myself before, I extracted the game ID from the rom itself. Now I realized the one in Narin's DAT file is different from mine... I edited the file and now it's working.
I just realized that you've removed Chrono Trigger J from the code list.
I'm still playing that game though, so is there a way to get the older DAT file? (or can someone at least tell me where to get my hands on the JP codes?)