Magneton was used in a gym battle against Ash Ketchum, after Voltorb has been defeated. Although it launched a powerful Zap Cannon, Magneton was no match for Pikachu because Pikachu was charged-up by a Mecha-Raikou and defeated Magneton with Thunder.
While fishing out for a Whiscash, Nero, who stole his Badge Case, Ash recalled battling Wattson and his Magneton.
|Zap Cannon||Watt's with Wattson?|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.