Lantacorn

"The Lantacorn is a creature closely connected to the powers of the sun and of plant life. As the seasons change, so does its aura. It can feed from solar energy and the presence of many of them can help even sickly forests grow healthy again."

Lantacorns are strongly based off gourds such as pumpkins, hence the name "Lantacorn" which is a play upon "jack o' lantern" and the lineart of this species. Most notably, all Lantacorns will be a shade of green at the first stage, but will "ripen" into oranges, yellows, darker greens and whites as they age.

Community Reaction
The most notable thing about the Lantacorn is that, after being in strays for an extended amount of time, their value diminished to such a point where getting one was incredibly annoying for some users. This was expressed through forum topics.

Due to their green colouration and prevalence beyond halloween, users took to calling them "fucking melons"