If the Pokémon holding this item creates hail with the moves Hail or Max Hailstorm, or the Ability Snow Warning (starting from Generation VI), it lasts eight turns instead of five turns. In Generation IX, it instead affects a Pokémon creating snow with the moves Snowscape or Chilly Reception, or the Ability Snow Warning, as hail is not present in these games.
In the Generation VII games, if hail has its duration extended by the Icy Rock, the turn counter on the user interface for these effects will indicate that it lasts for 8 turns for the player whose Pokémon used the move, while it will display that it lasts for 5 turns for their opponent. After 5 turns of hail have passed, the user interface will display that it lasts for 8 turns for both players.
In Omega Ruby and Alpha Sapphire, if held by a nicknamed Regice in the party, along with Regirock and Registeel, allows to spawn Regigigas in Island Cave, except at night or before defeating/catching GroudonOR/KyogreAS.
||A Pokémon hold item that extends the duration of the move Hail used by the holder.
|A Pokémon held item that extends the duration of the move Hail used by the holder.
||An item to be held by a Pokémon. It extends the duration of the move Hail when it's used by the holder.
|An item to be held by a Pokémon. It extends the duration of the move Hail when used by the holder.
||An item to be held by a Pokémon. When the holder changes the weather to snow, the snow will persist for longer than usual.