Teenage Mutant Ninja Turtles (1987): Season 5, Episode 13

5 - 13: The Ice Creature Cometh

Bebop and Rocksteady botch another mutagen experiment, resulting in a giant ice creature who Bebop dubs "Frosty", and Shredder uses this monster to freeze New York solid, preoccupying the Turtles long enough for him to steal thermal explosives needed to melt the Technodrome free from the ice.