Pokémon S17E38 - Summer of Discovery!

As they near Shalour City, Ash & Co. learn of a Pokémon Summer Camp being held by Professor Sycamore. In this camp, the trainers compete with each other in various activities, and get scored based on it with the top trainers entering the special Hall of Fame. When at the camp, they meet a trio of trainers, Shauna Trevor & Tierno who have Bulbasaur, Charmander and Squirtle as their partner Pokémon. A rivalry quickly develops between the seven and the Summer Camp begins...