When Viola's Surskit was defeated by Ash's Fletchling, Viola sent her Vivillon out to battle it. Fletchling attempted to use Peck on Vivillon, who used Psychic, slamming Fletchling onto the icy field made by her Surskit's Ice Beam before. Vivillon used Gust, causing Fletchling to land on the Sticky Web (also made before Surskit's defeat) and defeated Fletchling with Solar Beam, thus causing Ash to lose the Gym match.
The next day, Ash challenged Viola once more. After Surskit was defeated by his Pikachu, Viola sent Vivillon, while Ash switched Pikachu with Fletchling. Vivillon blocked Fletchling's Steel Wing with Psychic. Fletchling used another Steel Wing, hitting Vivillon, who retaliated with Gust, stopping the Peck attack. Fletchling managed to "ride the wind" (due to Ash's training) and proceeded to attack with Razor Wind. However, Vivillon used Sleep Powder, causing Fletchling to fall asleep and allow Vivillon to defeat it with Solar Beam. Ash sent Pikachu once more, who slammed its tail into the ground to endure the Gust attack. Pikachu used Thunderbolt, which collided with Vivillon's Solar Beam. Vivillon used Sleep Powder, affecting Pikachu. Vivillon was about to defeat Pikachu, who used Electro Ball on himself, dodging Solar Beam attack. Pikachu used another Electro Ball on Vivillon, who was knocked onto the ice, reducing its movement. Pikachu used Thunderbolt, defeating Vivillon, thus making Ash the winner of the Gym match.
Viola, Vivillon and the Gym Leaders came to stop the Megalith. Together, they launched a blast that hit the megalith, enough to free Serena's Braixen, Alain's Mega Charizard, Ash-Greninja, Steven's Mega Metagross and Professor Sycamore's Mega Garchomp. Vivillon helped in the attack against the Megalith, by using Solar Beam against the plants. After Ash and Alain rescued Chespie, the megalith stopped, allowing the group to fire an attack to destroy the Megalith. Vivillon watched as Lysandre appeared while Squishy and Z-2 combined their efforts to destroy the Megalith and defeat the villainous Team Flare leader once and for all.
Ash remembered his gym battle against Viola and her Vivillon and them fighting the megalith with the rest when he was reflecting back on his journey.
|Psychic (move)||A Blustery Santalune Gym Battle!|
|Gust||A Blustery Santalune Gym Battle!|
|Solar Beam +||A Blustery Santalune Gym Battle!|
|Sleep Powder||Battling on Thin Ice!|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.
Eileen Stevens (English)
Viola's Vivillon possesses the wing pattern associated with Vivillon that live in meadows.