Could you do the same thing you did for the music and silence the enemy thats hitting Sanji so that dosn't happen?
I thought about it. The only problem is that I don't have access to the enemy's sound files, no more than I have access to Sanji's sound files. As far as sounds go, I only have access to bgms and the voiced dialogues from the game.
The "battle grunts", judging from the files' names in the iso, seem to be in .aar format, and the sole aar converter I ever found works only for DS games.