Ep 3. Ancient Family Matters

In Pokemon season 12 episode 3 titled "Ancient Family Matters," Ash and his friends continue their journey through the Sinnoh region. As they make their way through a dense forest, they stumble upon an abandoned mansion. Curiosity gets the better of them, and they decide to explore the mansion.

As they enter the mansion, they are greeted by architecture that seems to belong to a different era altogether. The faintly glowing torches along the walls add to the eerie atmosphere of the place. As they walk further into the mansion, they discover that it's not completely abandoned. There's a caretaker who is very protective of the place and doesn't like strangers poking around. After some coercing, the caretaker agrees to let them stay for a while in exchange for listening to a story from his past.

The caretaker tells them that he comes from a long line of trainers who have been taking care of the mansion for generations. He also reveals that his family has an ancient secret that they have been keeping for years, which involves a rare Pokemon that only appears once every few years. He then explains that his family has been successful in capturing the Pokemon every time it appears, but this time, the capture didn't go according to plan.

The caretaker says that he's been tasked with finding the missing Pokemon, and he's been unsuccessful so far. Fearing that the Pokemon might have been taken by someone with ill intentions, Ash and his friends decide to help the caretaker.

They start searching for the missing Pokemon with the help of their Pokemon. They search the entire mansion and the surrounding area, but they can't seem to find any clues. Just as they're about to give up hope, they come across a secret passage in one of the rooms.

The secret passage leads them to a room that is filled with hidden treasures. As they explore the room, they hear a faint cry coming from behind a large crate. When they move the crate, they find the missing Pokemon hiding behind it.

The Pokemon is injured and weak. Ash and his friends nurse it back to health, and they find out that the Pokemon had been injured during its capture. They also discover that the Pokemon has a unique ability that can be used to help them uncover some of the mysteries of the mansion.

With the help of the caretaker and the Pokemon, they start investigating the mansion for clues. They discover that the mansion was built on top of an ancient civilization that was destroyed by a natural disaster centuries ago. They also find out that the civilization had a connection to the rare Pokemon that they had been searching for.

As they unravel the mysteries of the mansion, they experience some of the dangers of the ancient civilization in the form of traps and obstacles. They fight their way through the dangers, and they finally reach the center of the mansion where they find the answer to the ancient secrets.

They find out that the Pokemon is not just a rare creature but is also a symbol of the peace and prosperity that the ancient civilization once enjoyed. They also discover that the Pokemon had used its unique ability to protect the civilization from natural disasters, which ultimately led to its downfall when it became too powerful.

With the help of the Pokemon, they use the same ability to uncover a hidden treasure trove that the civilization had left behind in case of an emergency. They leave the mansion with the knowledge of the secrets it held and with memories of one of their most unique adventures yet.