On the way to the Fuchsia City, Ash and the others notice a giant mansion and decide to stop and get directions. When they enter the mansion, a Venonat begins to mislead them around the various traps in the mansion, including hidden Voltorbs, collapsible walls, and invisible walls. After falling through one to many traps, the wind up in a room with ninja Aya, who challenges Ash to a battle. Ash quickly defeats her, and her older brother comes out. It turns out that they did wind up at the Fuchsia Gym after all and Aya's older brother is Koga, the Gym Leader. Now Ash finally has his chance to win his sixth badge. Meanwhile, Team Rocket plans on attacking the mansion and stealing all of the poison pokemon inside.