The final battle is approaching, Gym Battle that is. Ash and co. arrive in Sootopolis City, home of Ash's final Gym Battle. There they met Juan, who is not only the Gym Leader but a Grand Festival winner as well. Does Ash have what it takes to beat an accomplished trainer like Juan?
The gang arrives to Sootopolis City. Ash and Pikachu plan to get the final badge from the Gym. They City itself is quite beautiful, but Ash still wants the final badge. They do notice the fireworks and everyone runs to it, even if Ash wants to battle. They arrive to an opening of a building, where the mayor attends the speech. He mentions the Gym Leader, Juan, who arrives to make a scene - water is being splashed up to the sky, making a beautiful view. Juan thanks the Mayor's compliment, but tells everyone it is his Pokémon that deserve a praise - Seadra, Gorebyss, Azurill, Luvdisc, Wailmer, Goldeen and finally, Milotic. The Pokémon use Water Gun and Bubble Beam, dazzling everyone.
The viewers are amazed by the performance. The Mayor thanks Juan for the performance, but they hear a strange sound - it is Team Rocket! Juan and Mayor are impressed by Chimecho, nevertheless. The gang warns Juan they are thieves, so Team Rocket confirms this. They release a net, then an electricity to weaken them. The gang goes to help him, but Juan tells them not to worry - the Pokémon already defend themselves. Milotic attacks the net with Iron Tail, freeing everyone. Milotic then blasts them off with Twister. Juan asks the gang if they are new in town, so they confirm. Ash introduces himself and asks for the Gym Battle, to which Juan accepts. May is amazed by the performance Juan gave everyone before, to which Juan tells them he was a Coordinator himself.
He got the ribbons, got in the Grand Festival and won the Ribbon Cup with Milotic. He raised his Pokémon to move and attack elegantly as he does. Brock wonders why Water Pokémon, so Juan tells him it is because of their appearance and "their weakness against electric attacks". He tells them that his Pokémon wait for an attack, then stand guard. Max tells Ash he might be quite difficult to beat, but Ash tells him that he has some tricks and ideals of his own as well. The butler greets Juan and the gang - he is more of a judge for the Gym. The battle field is a swimming pool and the butler tells the rules - the first battle is a Double battle, while the others are 3-on-3. Brock realizes that Juan wants to test Ash in different situations because of so many rules.
Juan starts by sending Sealeo and Seaking, while Ash with Pikachu and Snorunt. Pikachu attacks Sealeo with Thunderbolt, but Seaking protected it with Horn Drill and redirects the attack to Snorunt! Snorunt is quite damaged, but can still fight. Juan is less amused by the attack, so Ash declares that Pikachu uses Thunder, but again, Seaking uses Horn Drill to redirect the attack, but this time, Pikachu protects Snorunt. Sealeo attacks with Blizzard, freezing everyone. Snorunt takes advantage of this, using Icy Wind to stop the attack and an ice glacier is dropped. Seaking and Sealeo attack the obstacle and destroy it. Pikachu and Snorunt jump on the ice parts. Pikachu uses Iron Tail and Snorunt Headbutt, but Snorunt is stopped by Sealeo's Hyper Beam, defeating it.
James has transformed himself into Juan, so they plan to attack the gang. Ash sends Corphish, who uses Bubble Beam. Seaking and Sealeo dive in, so Corphish misses. Seaking uses Aurora Beam and Seaking Horn Attack. Pikachu evades while Corphish gets Seaking on its horn. Seaking uses Horn Drill, spinning Corphish around. Pikachu quickly uses Iron Tail on Seaking, while Sealeo used Aurora Beam, but missed - Seaking got hit instead of him. Pikachu is seen riding Corphish. Sealeo goes to stop them with Ice Ball, though Corphish protects itself. Sealeo uses Ice Ball again, while Corphish uses Vice Grip to destroy the ball. Sealeo uses again, though Pikachu smashes it with Iron Tail. Ash knows Ice Ball takes more time to be launched, but he did not expect that Sealeo used it at a rapid pace.
Juan tells Ash that his Pokémon are well trained in speed and elegance. Sealeo uses Ice Ball again, but Pikachu counters with Thunder. The ball does not crash, so Pikachu uses full power to smash the boulder. Corphish runs and uses Crabhammer, defeating Sealeo and bashing it against a wall. Juan compliments Ash for such tactics. The field changes into a land with a small pond. Ash sends Grovyle and Juan sends Luvdisc. Grovyle starts with Bullet Seed, but Luvdisc's speed makes him miss and Luvdisc uses Water Pulse. Grovyle dodges and uses Leaf Blade and spins to attack. Luvdisc evades and uses Sweet Kiss, charming Grovyle and putting Ash's victory in question.
- This episode had a very unusual style of battle: Five on Five with the first half being a double battle and the second half being three on three.
- Instead of Wallace, like in Ruby and Sapphire, Juan, from Emerald, is the Gym Leader in Sootopolis in the anime.
- Featured Pokémon: Caterpie, Butterfree, Beautifly, Venomoth
- A Sealeo's mouth was colored wrong during Juan's show.