I can’t remember for the life of me what this movie was called, but I remember it was animated and shown during the trailers for either Pokemon DVDs or old Ghibli movies. I can’t remember. The trailer included a young boy and his dog, and there was a big building on fire. The dog went got a bucket of water, and the boy was throwing water on the building. There was a nun, I think, and a group of young girls, and I think they looked at a painting or stained glass window at some point. It was animated, and I’m pretty sure stylistically it looked like a Ghibli movie.
I’m describing the trailer– I’ve never seen the movie. I want to see it now and I can’t get it out of my head.