Dialga is a Steel and Dragon type.
Fire, Rock
Water, ground, and rock.
Ground and rock Pokemon.
Fire-type Pokemon are weak against Ground, Rock, and Water-type attacks.
Fire-type Pokemon are weak against Water, Rock, and Ground-type attacks.
water is super-effective to ground, rock, and fire.
Fire type weaknesses is water,rock,and ground,
Rock type Pokemon are strong against flying, ice, bug and fire type Pokemon.
Usauly you use water Pokemon to attack fire pokemons regards Jack
Fire Pokemon are weak against water types, rock types and ground types.
Water, Ground, Rock
Water is strong against fire, ground, and rock