Pretty impressive although there were only two short battles. I've been wanting to do a Mario & Luigi game myself, just haven't. Plus I don't want to invest much energy in fan projects of copyrighted stuff anymore.
As for advice, I assume this will be more like a movie with interactive battles rather then an actual game-game. So I suggest working on your battles, make vary a lot more. Add more options and attacks as quick as possible. As it stands now, the battle is just you clicking and hitting space a few times. And make the partner controllable too.