I agree, Super Pastel is a strong possibility, though it's probably a weak version if that is the case because the side pattern really doesn't even look like a Pastel at all, let alone two copies.
Granite is another good possibility.
Green Pastel/Lace Black Back or something else in the Cinnamon family might be responsible for the speckling of the alienheads and the shrinkage and rounding of them, as well as the color I'm seeing, but it very well could be the photos are just looking a bit off from how they look in real life.
Impossible to know for sure without knowing the parents, but those are my best guesses for what could be responsible.