Pokemon: Season 15, Episode 10

15 - 10: A Call for Brotherly Love!

While in Driftveil City, Ash and friends run into Cilan's brother Chili. Chili wants to battle his brother to determine who is the strongest. Cilan agrees and defeats his brother. Chili becomes upset and blames Pansear for the loss and then goes off to find and try to defeat Cress. Ash and friends follow him to calm him down.