Don't worry about it. They shouldn't be in a different format.... Let me go back and look.
Edit: I'm looking and the outlining looks really crappy around the head fin, however, I don't see any color issues or things that wouldn't let you recolor. I used the same method for every sprite, so idk. Which sheet are you using?
Edit: I'm looking and the outlining looks really crappy around the head fin, however, I don't see any color issues or things that wouldn't let you recolor. I used the same method for every sprite, so idk. Which sheet are you using?