I've used paint for animation but haven't got it to work with anime studio yet (12 minute animation) . I'd like to take some 3d characters and take some 2d shots of it and texture a character in anime studio and if it looks good then maybe redo it.. I'm trying to use photoshop elements atm, but I'm photoshop illiterate.
A friend of mine did some animations using paint. He used a complex method which includes several open windows of paints and a software which made the windows semi transparent to obtain onion skin.
Actually, I think it's not a good idea, I mean, it is no more than an anecdote to say, Hey, I did an animation just using Paint!.
I'd use a media paint program if it didn't have a habit of crashing and corrupting what it exports so much. This vid was done in an old paint prog and put together with an ancient editor. Later we added a title screen, FX and I started replacing scenes in 3d, but then I decided that it would be better to use flash and chop up the rendered 3d scenes and animate them 2d, if possible..