Mario and Luigi Bowsers rom crash at bowsers first fight

I've been able to run this great up until bowser gets into his first fight with the thing with a long snout thats supposed to put boswer to sleep. the fight starts then the rom crashes. Is this due to anti-piracy or is it something entirely different?

Replying to #1

There is an entire thread for posts like this.

Yep, that's highly possible, the patch haven't been perfected on some flashcarts. Check out this thread for more info. :)