Ice Shot is an attack that the Ice Climbers can perform in the Super Smash Bros. series. It debuted in Super Smash Bros. Melee, and later appeared in Super Smash Bros. Brawl. The attack, as its name implies, is a move that's core theme is ice. It's a standard special move that can be executed by pressing B. Once you do, the two Ice Climbers (Popo and Nana) will shoot out two miniature icebergs, or one if Nana was killed.
It should also be noted that if Kirby inhales the Ice Climbers, this is the move he'll obtain.