After Wattson's Magnemite was defeated, Voltorb battled Ash's Pikachu. Voltorb used Screech to lower Pikachu's defensive strength but before it could actually hurt Pikachu, it was defeated by a single Thunderbolt.
|Screech||Watt's with Wattson?|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.