Many people belive that ther is a hidden gene in some of the Womas. Kevin and Kara at Nerd have Womas with a hidden gene, that interacts with other genes to create animals like the Soul Sucker and Inferno. The NERD Woma x Lesser is a product of the hidden gene (in my opinion) and Jeremy's is what the cross looks like without an additional catalyst. Jeremy Stone's Woma probably isn't carrying the hiddem gene.