Ep 5. Showdown in Pewter City

After finally reaching Pewter City, Ash and Pikachu are eager to battle the gym leader and earn their first badge. However, they quickly realize that things won't be so easy when they meet Brock, the gym leader, who is keen on proving himself as a skilled trainer. Brock tells Ash that he won't battle him unless he proves himself as a worthy opponent.

Ash initially agrees to Brock's challenge, but soon realizes that he is outmatched when it comes to battling. He and Pikachu are defeated time and time again, unable to stand up to Brock's powerful rock-type Pokémon. Despite this setback, Ash remains determined to succeed and finally earns Brock's respect after displaying his quick thinking and creativity in battle.

Meanwhile, Team Rocket is lurking nearby, hoping to steal the rare and valuable Pokémon being kept in the Pewter City Gym. They devise a plan to sneak into the gym by disguising themselves as museum curators and stealing the fossils on display.

Ash and Pikachu ultimately team up with Brock to stop Team Rocket and save the gym's precious fossils from being taken. The trio manages to thwart the villainous group's plans and prevent them from causing any harm.

In the end, Ash is finally given a chance to battle Brock for an official gym badge. He uses his newly gained knowledge and skills to put up a good fight, but ultimately falls short of victory. Despite this, Brock recognizes Ash's skills and gives him a badge as a token of his appreciation for their intense battle.

"Showdown in Pewter City" is a thrilling episode that showcases the importance of perseverance and creativity when it comes to battling in the Pokémon world. It also offers a glimpse into Ash's growth as a trainer and the difficulties he faces in his quest to become a Pokémon Master.