Pokemon the Series Season 18 Episode 4 A Stealthy Challenge!

Our heroes, Ash, Pikachu, and their friends, arrive at the sprawling city of Lumiose. They're eager to take on the Lumiose City Gym and earn a badge. But first, they head to a restaurant, where they meet a strange resident who introduces them to the city's underground network of wealthy and powerful Pokémon Trainers.

The group is intrigued by this secretive group, and decides to explore and possibly challenge them to a battle. They wind up facing off against a Phantump in the middle of the city's bustling shopping district, and it's a tough battle. As the situation becomes more dire, Ash's quick thinking and impressive battling skills save the day, and he earns the respect of the underground Trainers.

But Ash's victory is short-lived, as a mysterious new figure appears and challenges him to a battle. This enigmatic Trainer, clad in a black hooded coat, is revealed to be none other than Alain, a formidable foe from the Kalos region. Ash accepts his challenge, and the two prepare for battle.

The match is intense, with both Trainers pushing to their limits. Pikachu and Charizard, Ash's trusted partners, engage in a heated battle against Alain's tough-as-nails Metagross and Bisharp. Although Ash fights valiantly, he ultimately falls to Alain's superior skills. But instead of being discouraged, Ash is motivated to improve his battling and continue his quest to become a Pokémon Master.

As the episode comes to a close, our heroes bid farewell to the underground Trainers and set off to continue their journey. They know that they'll face tougher and stronger opponents as they go, but they're ready to rise to the challenge and become the very best.