Nandarou
Japanese title: なんだろう
Alternative titles: What Is It?
Type: CM
Source: Other
Episodes: 1
Status: Finished Airing
Aired: Nov 1, 1992
Duration: 1 min
Rating: PG - Children
Studios: Studio Ghibli
Genres: Comedy

A short TV advertising spot featuring a small green pig with enormous eyes. 

The title Nandarou implies that even its creators didn't really know what kind of creature it was supposed to be. However, NTV (Nihon TV) chose it as their station's mascot. 

(Source: ANN, Nausicaa.net)