Super leopard is like super pinstripe, it exists but it doesn't look any different than the heterozygous form. A leopard x leopard would result in 25% super leopards but you would never know that they're supers without test breeding. It's similar to pos hets except it's pos supers. I personally don't really understand codominance but most geneticists say that all ball python morphs are incomplete dominant so I go with that. It took me a while to fully understand all of the allelic and sex-linked morphs but I think I have most of it figured out, but there are still some things I'm trying to learn.