well I am a crappy artist so I cannot draw them, but here are some basic ideas.
Egg: pretty much the same except more then one heart, kinda going inward. like you have one heart then inside that, and one inside that etc.
Baby: Less fur and a slightly lighter pink, Eyes as a heart.
Teenage: More fur, a Darker pink though, Eyes as a heart, Two Small pink fangs from the mouth.
Adult: same amount of fur in teenage, the fur is about a shade darker pink then teenage, fangs from the top about the size of the Zaphaos, two small fangs (just barely able to been seen) bigger ears. and the heart/s on it have hearts inside like the egg.
Note: the tips on the ears on Baby, Teenage, Adult, are black.
any good additions? I will give credit!