Glowing darling

A glowing darling was a pink creature of unknown origin that had two antennae with flashing tips, and went extinct a thousand years ago from the present time of the Smurfs cartoon series. One appears in the episode "A Pet For Baby Smurf" which is actually Azrael the cat who was transformed by magic into this form by his master Gargamel to be his ultimate Smurf catcher. It initially behaves like a friendly creature, but eventually reveals its malicious intent as it seeks after Smurfs.

In the episode, after Gargamel's creation of the "glowing darling", Clumsy and Baby Smurf encountered it as they were looking in the forest for pets to put on display at the Smurfs' pet show. The creature attracted Baby Smurf's attention and followed the two Smurfs home, where it was entered into the show as Baby Smurf's pet. Papa Smurf upon seeing the "glowing darling" looked into his books and discovered that actual "glowing darlings" were extinct for a thousand years, making him suspect that this one wasn't a real "glowing darling" at all. As Baby Smurf was being awarded with a ribbon for his "glowing darling" being the best pet of the show, it revealed its true intentions and scared away the Smurfs. Baby secretly used his magic to shrink the "glowing darling" to a harmless small form, and the Smurfs sent it back to Gargamel in one of Jokey's exploding "surprises", where it changed back into Azrael.

Empath: The Luckiest Smurf stories
Glowing darlings are recorded in the Smurfs' Fantastic Beasts And Where To Find Them volume in the EMPATH: The Luckiest Smurf story series.