Taming of the Shroomish (Japanese: ハブネークVSキモリ！必殺のはたく攻撃！！ How Weird! Riddle of Shroomish Mansion) is the 9th episode of Pokémon: Advanced.
Ash, May, Brock and Max have arrived at a small town (Rinshin Town) on their way to Rustboro City. Brock decides to stock up on supplies, while Max is eager to go hunting for city dwelling Pokémon. Max soon stumbles upon a very frightened Shroomish who is hiding in an alleyway. Ash, Max, Pikachu and their new Shroomish friend head off to find a Pokémon Center. On their way they pass by a deserted mansion that is being torn down. There, the gang learns that not long ago most of the city was just plant life and that many, many Shroomish lived in the area. They also learn that strange things are going on at the mansion, and many people believe that it's haunted. A little investigation reveals that the mansion is actually inhabited by all of the Shroomish who used to live in the forest. When the forest was destroyed, they had nowhere else to go. All of the strange noises and smells that the construction workers were hearing were actually the Shroomish! The grandson of the owner decides to tear down the mansion as planned, but to convert all of that land into a forest for the Shroomish.
May breathes the air of the city as she, Brock, Max and Ash arrived to a small town. The gang makes plans what to do; May wants to go shopping, Brock wants to buy groceries, Max wants to see some city Pokémon and Ash proposes to get some lunch. They split, so May goes with Brock and Ash with Max. A group of workers are shown working near an old mansion, which find it very creepy. Among them is Team Rocket, where James and Meowth argue. Jessie is hungry, but James reminds her that they need to work to get some food to capture Ash's Pikachu.
May is looking at the dresses and jewelry, despite Brock advising to get some supplies. Meanwhile, Ash and Max have gone out of the burger restaurant. Max then searches for Pokémon in the street and finds a Shroomish. As May and Brock are going to the Pokémon Center (while Brock carries the supplies), they hear a mention of a cursed mansion named Green Lodge. May is interested in it, and the girl answers that the workers (including Team Rocket) are tearing the trees near the mansion. The girl also says that the workers see some footprints on the floor and while they are in, they can't breathe because of the smell and get confused. Brock is terrified at the idea of going in. However, May is tempted to enter.
Max notices that Shroomish is angry, so he takes some of Ash's Pokémon food and offers the Shroomish. However, the Shroomish releases Stun Spore, forcing Ash and Max to go away. Brock and May are going to the mansion, despite Brock's fear of scary places, for May wants to go there. Ash places some of Brock's Pokémon food to Shroomish. Shroomish hesitates, so Pikachu eats a portion of it, proving that it is delicious, so Shroomish eats it as well. Max notices that Shroomish usually live in forests, not in cities. Ash advises to go to Pokémon Center, but before they do, Max places a handkerchief as a headband upon Shroomish's head, making it happy. Brock and May enter the mansion, while May and Ash go around it. Shroomish becomes sad and walks inside the mansion, with Ash and Max following it. Team Rocket spot them and go to capture Pikachu.
The Shroomish with the headband hops inside the mansion. Ash and Max meet up with May and Brock. A man comes, warning them that the trees are being cut down. Max explains that Shroomish came into the mansion, but the man denies the fact, for the Shroomish have vanished years ago. The man remembers that he played with Shroomish with his grandpa, but with the expansion of the town, trees were cut down and Shroomish disappeared. The town decided to destroy the mansion for more buildings to be constructed. The gang enters the mansion looking for Shroomish. Eventually, they find it, being shivering. The other Shroomish come to it, so Brock suspects that Shroomish must have gotten into the mansion, with the trees being cut down. Suddenly, an explosion occurs, as Team Rocket came. James sends Cacnea and Jessie her Seviper. Pikachu uses Quick Attack, but the Shroomish stop the attack by yelling.
A strange noise is coming from the mansion - hordes of Shroomish come. Seviper uses Poison Tail, while Cacnea attacks with Pin Missile. The Shroomish use Stun Spore, so the gang leaves the area. Max thinks that Shroomish want to play with the man again. Team Rocket got out as well and Meowth plans to take revenge on Shroomish. The man apologises to Shroomish. Max attempts to convince the man to stop the construction. Suddenly, Team Rocket appears in a machine, trying to destroy the mansion and capture the Shroomish. Team Rocket forces the Shroomish out and grabs them one by one. Pikachu uses Thunderbolt, but the machine absorbs the electricity. The Shoomish use the Stun Spore, but Brock sends Forretress, preventing the spores to enter the town. Forretress uses Rapid Spin, the spores are removed. In the machine, the air is getting stale, so Meowth opens the windows, but the spores enter the machine. The Shroomish use Leech Seed on Team Rocket.
Max brings her Torchic, who uses Ember, setting the Shroomish free. Pikachu uses Thunder to blast Team Rocket away. After the battle, the man says the mansion has to be destroyed, but promising to plant seeds to grow a new forest. The heroes leave the mansion, waving goodbye to the man and Shroomish.
- "Look Brock. All of the latest styles. Aren't they great?" - May
- "Oh yeah, gorgeous." - Brock
- The "Who's that Pokémon?" is Snubbull.
- The episode title is based of the comedy play written by William Shakespeare, "The Taming of the Shrew".