Heat Rock

“An item to be held by a Pokémon. When the holder changes the weather to harsh sunlight, the sunlight will persist for longer than usual.”

“An item to be held by a Pokémon. It extends the duration of the move Sunny Day when used by the holder.”

“A Pokémon held item that extends the duration of the move Sunny Day used by the holder.”

“A Pokémon hold item that extends the duration of the move Sunny Day used by the holder.”