Hopefully it's just a simple method of:
1. Having the clean japanese nds rom file
2. Having the english patch the team releases
3. Using xdelta to patch the japanese nds rom with the english translation
Woooow! Been looking forward to this translation for a long time. I'm a huge fan of all these cross over games starting from Namco X Capcom on PS2! Please have all my support, translation team! I can't wait to play this on DS fully translated! (Also Kaguya best girl)