* Water: Water-type moves deal double damage to Rock-type Pokémon.
* Grass: Grass-type moves also deal double damage to Rock-type Pokémon.
* Fighting: Fighting-type moves deal double damage to Rock-type Pokémon.
* Ground: Ground-type moves deal double damage to Rock-type Pokémon.
* Steel: Steel-type moves deal double damage to Rock-type Pokémon.
Keep in mind that Rock-type Pokémon are resistant to normal, flying, fire, and poison-type attacks.