Pokémon Season 1 Episode 66

Ash and his friends are trapped in a snowstorm. Brock suggests that the group uses his Onix to create a bivouac. They are about to start when a strong gust of wind blows Pikachu away, and Ash tries to save him. After saving Pikachu who is about to fall off a cliff, Ash finds himself separated from the rest of the group. He and his other Pokémon must brave out the rest of the storm together in a cave.