Ash, Iris, and Cilan arrive in the town of Aspertia City, excited to explore the area. They are particularly interested in the local Pokémon Gym, which has recently been taken over by a new Gym Leader named Cheren. As they walk through the city, they notice a large crowd gathered outside the Gym, buzzing with excitement about the new leader. The trio decides to check it out, eager to see what Cheren is like and to challenge him.

Upon entering the Gym, they are greeted by Cheren, who is enthusiastic and confident. He explains that he has been training hard and is ready to take on challengers. Ash expresses his desire to battle Cheren for a Gym Badge, and Cheren agrees, but first, he wants to test Ash's skills with a battle against one of his Gym trainers. This trainer, a young girl named Bianca, steps forward to take on Ash.

The battle between Ash and Bianca begins, with Ash using his Oshawott against Bianca's Pignite. The fight is intense, with both Pokémon showcasing their abilities. Oshawott uses Water Gun, but Pignite counters with Ember, creating a dynamic back-and-forth. Ultimately, Ash's experience shines through, and he manages to defeat Bianca, earning the right to challenge Cheren.

After the battle, Cheren and Ash prepare for their Gym match. Cheren reveals that he has a strong strategy and is well-prepared for Ash's team. The atmosphere is charged with anticipation as the two trainers face off. The battle begins with Ash sending out his Pikachu against Cheren's Patrat. Pikachu quickly gains the upper hand, using Thunderbolt to take down Patrat.

Cheren then sends out his next Pokémon, a powerful Lillipup. The battle intensifies as Lillipup uses Bite, but Pikachu dodges and retaliates with Quick Attack. The crowd is on the edge of their seats as the two trainers push their Pokémon to the limit. Cheren's strategic thinking becomes evident as he uses Lillipup's agility to outmaneuver Pikachu, but Ash remains determined.

As the battle progresses, Cheren's final Pokémon, a strong Herdier, enters the fray. The stakes are high, and both trainers are fully invested in the outcome. Ash calls on his experience and teamwork with Pikachu, leading to a climactic showdown. Pikachu uses a powerful Volt Tackle, but Herdier counters with a strong Tackle of its own. The two attacks collide, creating a dramatic moment that leaves the audience in awe.

In a final push, Ash encourages Pikachu to give it everything it has. With a burst of energy, Pikachu unleashes a massive Thunderbolt, overwhelming Herdier and securing Ash's victory. The crowd erupts in cheers as Ash is awarded the Basic Badge by Cheren, who acknowledges Ash's skills and determination.

After the battle, Cheren expresses his respect for Ash and his growth as a trainer. The two share a moment of camaraderie, discussing their aspirations and the challenges they face ahead. Ash, Iris, and Cilan leave the Gym, excited about their journey in Unova and the adventures that await them. The episode concludes with the trio setting off to their next destination, ready to take on new challenges and meet new friends.

In the ending of "There's a New Gym Leader in Town!", Ash and his friends face off against the new Gym Leader, who is revealed to be a strong and determined trainer. After a challenging battle, Ash ultimately emerges victorious, earning the Gym Badge. The episode concludes with Ash and his friends feeling accomplished and excited about their journey ahead.

As the episode nears its conclusion, the atmosphere in the Striaton Gym is charged with anticipation. Ash, Pikachu, Iris, and Cilan stand ready for the final moments of the battle against the new Gym Leader, who has proven to be a formidable opponent. The scene is set with the vibrant colors of the gym, filled with various Pokémon and the excited murmurs of spectators.

The battle intensifies as Ash commands Pikachu to unleash a powerful Thunderbolt. The electric energy crackles in the air, illuminating the gym with a bright flash. The new Gym Leader counters with a strategic move, showcasing their skill and determination. Ash's heart races; he feels the weight of his friends' expectations and the importance of this battle for his journey as a Pokémon Trainer.

As the battle progresses, Ash reflects on his growth and the lessons he has learned throughout his journey in Unova. He recalls the challenges he has faced and the bonds he has formed with his Pokémon. This moment is not just about winning; it is about proving himself and the strength of his friendship with Pikachu.

The climax of the battle arrives when Ash, with a surge of confidence, calls for a final attack. Pikachu, fueled by Ash's unwavering belief, channels all its energy into a spectacular move. The gym erupts in cheers as the attack lands successfully, knocking out the Gym Leader's final Pokémon. The tension in the air dissipates, replaced by a sense of triumph.

With the battle concluded, the new Gym Leader acknowledges Ash's skill and determination, presenting him with the Gym Badge. Ash beams with pride, holding the badge high as a symbol of his hard work and dedication. Iris and Cilan cheer him on, their faces filled with joy and admiration for their friend's achievement.

As the episode wraps up, Ash, Iris, and Cilan share a moment of camaraderie, discussing their next steps in their journey. They express excitement about the adventures that lie ahead, reinforcing their bond as friends and fellow trainers. The scene fades out with the trio walking together, ready to face whatever challenges come their way, embodying the spirit of friendship and perseverance that defines their journey in the Pokémon world.

In the episode "There's a New Gym Leader in Town!" from Pokémon's season 16, there is no post-credit scene. The episode concludes without any additional scenes or content after the credits roll. The focus remains on the main storyline and character developments throughout the episode, with no extra material provided in a post-credit format.

The new Gym Leader introduced in this episode is Marlon, who specializes in Water-type Pokémon.

When Ash and his friends arrive at the gym, they find that Marlon is not present, leading to a search for him and a challenge to prove their worth.

Marlon is portrayed as laid-back and carefree, contrasting with the more serious and competitive nature of previous Gym Leaders.

In his battle against Marlon, Ash uses his Pikachu, showcasing their strong bond and teamwork.

Ash and his friends learn the importance of perseverance and understanding that every Gym Leader has their own unique approach to battling and training.

The episode "There's a New Gym Leader in Town!" from Pokémon's season 16 is generally family-friendly, as is typical for the series. However, there are a few elements that might be considered potentially objectionable or upsetting for very young children or sensitive viewers:

1. Rivalry and Competition: The episode features competitive elements, including confrontations between characters that may involve tension or conflict, which could be intense for some viewers.

2. Emotional Upset: Characters experience moments of disappointment and frustration, particularly related to their Pokémon battles and aspirations, which may resonate with children who are sensitive to feelings of failure.

3. Mild Threats: There are instances where characters express determination to win at all costs, which could be interpreted as aggressive behavior, though it is presented in a light-hearted manner.

Overall, while the episode contains these elements, they are handled in a way that aligns with the show's overall positive and adventurous tone.