It is owned by many Glitch Trainers in the Red/Blue versions only.
Its sprite is a random glitch block, while its cry is identical to the sound made during Jigglypuff's sing. When one views its stats, the music playing is a slower version of the Mt. Moon theme.
When defeated in battle, the a row of "n"s appear at the top of the screen and gradually fill it before the battle ends. It learns many glitch moves and moves of other types.
It occupies Hex CC 204 (see [1]). If it were traded to the Yellow version, it becomes an a .8. It learns several glitch moves prior to level 100, including TM35 (twice), TM05, and TM50.