Ep 16. Master Class Choices!

Ash and his friends arrive at a city where a Pokemon showcase is taking place, and Serena decides to enter with her Braixen. While at the showcase, they meet an old acquaintance, Shauna, who is also competing. Shauna is excited because the winner of the showcase will earn a spot in the upcoming Master Class, a prestigious competition for the most skilled Pokemon trainers.

As the showcase begins, Serena and Shauna both impress the judges with their performances, and they both make it to the next round. However, they soon discover that they will have to face off against each other in the semi-finals. Despite their friendship, Serena and Shauna both give it their all in the battle, with Braixen and Shauna's Goodra putting on an impressive show. In the end, however, Serena emerges victorious.

After the battle, Serena is faced with a difficult decision. She must choose between accepting her place in the Master Class or declining in order to continue her journey with Ash and her friends. As she chooses, she reflects on her goals and dreams as a Pokemon trainer. Meanwhile, Ash and the others enjoy the rest of the showcase, with Clemont and Bonnie getting into some misadventures with a troupe of performing Pikachu.

As the episode comes to a close, Serena finally makes her decision. Regardless of what she chooses, her friends support her and are excited for her future as a Pokemon trainer. With the Master Class on the horizon, a new chapter of their journey is about to begin.