This Swanna belongs to Skyla of the Mistralton Gym and it is considered her most powerful Pokémon.
When Cilan challenged Skyla, Swanna was the last Pokémon she used. It defeated Cilan's Crustle, but struggled a bit battling Stunfisk which it had a type disadvantage with and was also burned by its Scald. However, thanks to its Aqua Ring, it was able to overcome its burn and defeated Stunfisk. It appeared again in Ash's Gym battle against Skyla in An Amazing Aerial Battle!. It once again overcame severe type disadvantage, managing to block Pikachu'sThunderbolt by using Aqua Ring as a shield and overwhelming him with Hurricane and Brave Bird. It then battled Ash's Tranquill and at first it appeared to have the advantage but then Tranquil evolved into Unfezant and defeated Swanna with a powerful Aerial Ace.