Filmation: Bat-Mite

I'm not 100% certain, but this cel of Bat-Mite is very likely from the 1977 television series, "New Adventures of Batman". During that season, several episodes included Bat-Mite trying to help the Dynamic Duo. I'm almost certain the look of the character on this cel has not appeared in any other Filmation series. Bat-mite is variation (or knock-off) of Superman's pest/pal Mxyzptlk. But rather than trying to trick, taunt or defeat, Bat-Mite is a huge fan of Batman's and tries to help him. Usually unsuccessfully.

I knew Bat-Mite had been in the comics for quite a while but I didn't know specifics. So I went to Wikipedia: "Bat-Mite made his first appearance in Detective Comics #267 (May 1959) in a story titled "Batman Meets Bat-Mite", and was created by writer Bill Finger and artist Sheldon Moldoff."