Ep 37. Up Close and Personable

It's the third day of Professor Rowan's Pokémon Summer Academy, and he's sent the campers to observe Water-type Pokémon living in a nearby lake. There are just two main rules: no catching Pokémon, and no leaving the area! As the Trainers begin searching for Water-type Pokémon, Pikachu sees a flash of light and spaces out for a moment, but quickly recovers. Ash and his friends continue to observe Pokémon until Angie, another Trainer on Ash's team, notices that her Shinx is missing. And Piplup falls into a brief trance after it sees the same flashing light as Pikachu!