Changing the battle intro animation?

This won't help too much, but I asked the same thing about the character battle intro animations before on Slick Productions, and Lenophis told me that "I don't know where they are, but I suspect they are in bank D0."

Using the debugger to locate them might work though, I'd imagine.

As for a list of what all the hex does, that is not feasible due to the fact that the same hex values can mean many different things depending on what is being done, like assembly code, event, music, pointers, and many other things. Which kind of hex code are you inquiring about specificly?