Nibbles

Nibbles
Nibbles is an animal that Starfire adopts as a pet cat in the Season Three premire, "Cat's Fancy". After Starfire save Jump City from a bomb by hurling into space, but come back to earth unconscious, devastating Robin. When Robin trying to confess his true feelings to Starfire, she saw a white cat, she adores him and calling the cat Nibbles, thus adopting him. Back at Titans Tower, Starfire is happily playing with new pet Nibbles, which makes Robin really jealous that Starfire playing with a cat, he say the only way to make Starfire loves him is to make himself a cat. Raven, Cyborg, and Beast Boy gloats about this and doubt that statement. The next morning, Robin believe that he turned into a cat which is actually cat gloves, Raven and the others laughed at him. Later, Robin dressed as a purple cat, much to the surprise of Raven, Beast Boy, and Cyborg, Starfire comes out of the kitchen holding Nibbles and see Robin in his cat disguise, she quickly tosses Nibbles out of her hands and into the kitchen and adores Robin disguise and calling him "Sassypants". Nibbles was never seen throughout the rest of the episode nor the series. Cat's Fancy was his first and currently only appearance in the series. Its possible that Nibbles still reside in the titans tower since Starfire tosses him back into the kitchen.