So I've made replacement sprites for all available sprites and set the size in the size.tx file, but the sprites have a weird black outline in some places when used in Baba Friend, any advice?
This is caused by the sprites using RGB instead of Indexed colour mode. E.g. Aseprite can adjust that.
That did the trick! Everything was made in Aseprite so that should be an easy fix lol, thanks for the help!