Is there a particular time to try waking up zubats in carotos cave with flash ? Because right now , the cave is not dark , therefore it says that i can't use flash
EDIT :
The first time i entered the cave i didn't have flash , so next time i had to " talk " to my previous position to reactivate the dialogue , then it asked me if i wanted to use flash , don't know if bug or something , but that was kinda not-that-logical way to activate the event