If you bred a Super Special to a Crystal you would get half Crystals and half Super Specials. All of the babies would be Special from the fathers side (SS) and there would be a split of Mojaves and Specials from the mothers side(Crystal). A Super Special Mojave is not possible.
I have done Pastel Crystal X Special, and this season I did Pastel Super Special X Pastel Special and Pastel Super Special X Special. I did hatch out Super Specials and Pastel Super Specials, but nothing else.