Good Friends, Great Training!

Having met up with their old friend, Tierno, Ash decides to challenge him to a practice battle to prepare for his upcoming Gym battle with Clemont. During the battle, however, Team Rocket appears and kidnap Tierno's Pokémon as well as Ash's Sliggoo. When Ash & Co. finally find Team Rocket, trouble starts to break out due to a fire, and it's up to Sliggoo to help sort the situation. Will Sliggoo save the day?