DQ9 Rom freezes at the Greygnarl scene

Hi, I've just got into Dragon Quest 9, Xenom version on R4 and after playing for 30 hours the game decides to freeze everytime I get to the cut scene with the 2 dragons fighting, making it impossible for me to carry on. Does anyone know a way for me to get round this, as after having put so much time into the game I really want to finish and it and the thought of restarting just disheartens me, thanks to anyone that can help.

Looks to me like some sort of AP no body noticed.. maybe im wrong, but you can try and look around for a patch if it is. if not, get a new ROM for this game. You can still use the same .sav file, just make sure to rename it to match the .nds name. Hope I helped ^-^

Back up the contents of your MicroSD card and format it.