I already does edit sprites. I did my best to get all of Wichu's features in and then some. I have thought about mass import, and with the way I have it set up, it could be done, but it would take a while to get everything synced up. I'm not sure how editing images would work though, with the mass import. I guess you have the sprites be named the name of the pokemon? Hmm, I'll have to play with it. It won't be in the first release, but definitely later.