Moogles are small creatures that appear throughout several Square Enix game series, including the Final Fantasy series, the Seiken Densetsu series, the Chocobo series, and the Kingdom Hearts series. The Japanese name is a portmanteau of the Japanese words mogura (mole) and kōmori (bat).

Moogles have small, black eyes (often closed) and red, pink, black, or purple bat-like wings. A single black antenna sticks up from their heads, with a small colorful ball (usually red, yellow or pink) at the end called a "pompom". Their ears are usually shaped like a cat's and their fur is white or light pink. However, in Crystal Chronicles they have a different body shape, lacking a distinct head and torso, while in Tactics Advance and Final Fantasy XII they have longer, rabbit-like ears and beige to gray fur. When they first appeared, in Final Fantasy III, Moogles generally ended their sentences with the word "nya", the Japanese equivalent of a cat's "meow". In the later games, they use the word "kupo" instead; some games briefly mention a Moogle language formed out of various permutations of "kupo". In the Final Fantasy III Nintendo DS remake, the word "nya" was replaced with "kupo".

From Wikipedia