Changes the weather to hail when the user enters the field. This hail continues for five turns, or eight turns if the user is holding an Icy Rock. If more than one Pokémon have weather-inducing ability, the slowest one is the one that will be active.
The user is unaffected by any of the following moves: Boomburst, Bug Buzz, Chatter, Confide, Echoed Voice, Grass Whistle, Growl, Hyper Voice, Metal Sound, Noble Roar, Parting Shot, Perish Song, Relic Song, Roar, Round, Screech, Sing, Snarl, Snore, Supersonic, and Uproar. Howl, Roar of Time, Sonic Boom, Heal Bell, and other moves not listed are not affected.