The Leopard ball is a dominant morph first produced in 2005. They are characterized by their aberrant bold black markings, the light irregular blotch on the top of their heads, and black markings on their bellies.
This is what I found about Leopard Ball Pythons, I don't personally have any experience with them so I can't give an opinion. WOBP doesn't have a summary of the morph either which is a shame.