Juveykhan

(since I find people prefer when I write a story rather than give all the technical mumbo jumbo I'll just put the story and you can ask aspect of why I pick the colors and such).

Kangaskhan and its male equivelant had always cause mystery as no one had ever seen how the small baby in the female's pouch had ever grew into an adult.
For years it had been assume that the baby simply evolved directly into an adult when the time came, however, this mid stage was recently discovered and proved that there was actually a mid stage to this development.

We named it Juveykhan as it was a Juvenile stage of its 2 further ones.

Also notably, it is classified as typeless, however the type is actually dependant of the gender (males are fighting types and females are normal types).