Steel Pokémon
Use a strong Pokémon with a high-energy attack that does significant damage not only to the Defending Pokémon but also to itself.
Details
The main attacker in this archetype is a strong Pokémon with a high-energy attack that does significant damage not only to the Defending Pokémon but also to itself. Each Metal Energy card attached to the Pokémon reduces the damage done to self by 20 while reducing the damage done to the Defender by only 10. Steel Chansey
(based on BS Chansey's Double-Edge attack) is the first widely-popular variant of this archetype. Other variants include Steel Arcanine (based on BS Arcanine) and Steel Rocket's Zapdos.