B:TB&tB episode 19 "Legends of the Dark Mite!" Directed by Ben Jones.
A few more of Bat-Mite's foes: Mr. Polka Dot, Kite-Man, Mr. Zero (a predecessor to Mr Freeze), and Killer Moth. The snow on the Mr. Zero character was sent on a separate layer so all Korea had to do was slowly pan that layer.
"Batman: The Brave and the Bold" ™Warner Bros. Animation.