Barret's Magnezone is a member of Plasma Gang who was operating in the Unova region while
Ash Ketchum and his friends were there. The first mission it was seen participating in was when Plasma Gang located
N in his secret hideaway by using special equipment.
Barret's Magnezone was sent out to battle the Pokémon there.
Ash's Pikachu managed to knock it out with its powerful
Thunderbolt.