Type chart, effectiveness and weakness explained in Pokémon Go

Immunity to Electric-type Attacks: Since Quagsire is partly ground-type, electric-type is attacks entirely null against them. Resistances: Quagsire takes half the damage from fire, rock, poison and steel-type attacks.

Along with its previous effects, Lightning Rod also gives the Pokémon immunity to all Electric-type moves, and raises the Pokémon’s Special Attack by one stage whenever it is hit by an Electric-type move.

Gastrodon is a ground and water type Pokémon. ground type pokémons are strong against fire, electric, poison, rock, steel pokémons but weak against grass, bug pokémons.

There were multiple situations in Hoenn where Ash’s Taillow/Swellow is shown resisting electric-type moves and even the characters mentioned that it’s weak to them. The thunder armor thing was just the final nail to the coffin, proving once and for all that Swellow resists electricity.

The ability is most useful in double/triple battles. When hit by the move, it deals no damage to the ability-bearer but raises its Special Attack by one stage. Stats can be raised to a maximum of +6 stages each. Lightning Rod will activate for an Electric-type Hidden Power, but not Electric-type Judgment.

Alolan Raichu can also learn those. If you are willing to give up Lightning Rod, choose Alolan Raichu, and get another guy with Lightning Rod. If you are not willing to give up, Raichu is still good, and you could get another Psychic type on your team. So basically I would recommend Alolan Raichu.

Pokémon Generations In The Adventure, Red’s Pikachu attempted to attack three wild Wooper in an Ecruteak City river with Thunder Shock from a tree above, but it was ineffective due to their immunity to electricity. The Wooper retaliated with Mud Shot, sending Pikachu flying.

Gastrodon
Gastrodon – #423 – Serebii.net Pokédex.