A Leopard Mojave is a not a necessarily a "morph" per se, but rather a combo of the Leopard and Mojave morphs. I guess it really depends on where you fall with respect to "ball-netics" vernacular. Some would say that it is a morph, and that it is a combo of the "base" morphs Leopard and Mojave. That's neither here, nor there, though.
If you bred a Leopard with a Mojave, on average, 25% of the offspring would be normals; 25% would be Leopards; 25% would be Mojaves; and 25% would be Leopard Mojaves.
Both Leopard and Mojave have been around for a while (Mojave longer than Leopard), as has the combo.
World of Ball Pythons Genetics Wizard is a good tool for looking at some of this stuff if you are interested:
http://www.worldofballpythons.com/mo...eopard-mojave/