Magneton

It is actually three Magnemite linked by magnetism. A group can set off a magnetic storm.

Magnetic Resonance (20): If you have a Stadium card in play, this attack does 20 damage to 2 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Magnetic Release (40+): Does 40 damage plus 10 more damage for each Energy attached to the Defending Pokémon.