Here's a link to the introduction of the Mario http://ball-pythons.net/forums/showt...io-Ball-Python!
Wanted to add that so people could see the history. So I surmise, from 2012 when the first Mario hatched to 2016, proven co-dominant with the Super Mario.
Me I love dinkers, and have quite a few. I have a gene I know is dominant (or recessive with good markers) and am this year trying to prove the co-dom or visual. Great work there, and great example of the work and time it takes to prove out great genes.