Episode 28

http://www.dailymotion.com/video/x5ljyhj In episode 28 of the nineteenth season ( Pokemon the series:XYZ), 'seeing the Forest for the Trees!; It reveals the true story of why Ash Ketchum loved Pokemon, when Ash was a little boy, he went on a field trip. However, during the trip, it started to rain, and Ash got separated from his group. Ash was forced to take shelter under a hollow tree. However, he noticed a group of Pokemon who were also seeking from the rain. So, he invited them inside the tree and the Pokemon kept him safe and warm. This experience is what inspired Ash into becoming a Pokemon trainer.