Cheesy Cave Story has been improved. Finally fixed the bugs that affected the rules of the board game and added new features! See http://www.fluff8836.net/vb or http://doukutsu.rdy.jp to get the latest version. (Yes, I am confident enough to share to the Doukutsu Uploader. And no, AI and Netplay are still yet to be developed). PLEASE BACKUP your statistics data, see the Changelog.
That would probably fix the issue pretty easily.
Yeah having the same art style would be quite hard, but I suggest that the animators just practice the same art style, an art style that they all are comfortable with, and/or they copy the style from the storyboards, or the concept art. The characters will all be drawn with the same characteristics, it's just the style that needs to be synchronised. Right now I only think agreeing and practicing one between the animators will be the best option lol