Ash Ketchum is the main protagonist of the Pokémon Anime series. He is a 10-year-old Pokémon Trainer from Pallet Town in the Kanto region that has always dreamed of becoming a Pokémon Master. He is the first human character to be introduced in the series and is currently the only character shown to have been to all of the regions. Ash is the winner of the Orange League and is also the Alola region's Pokémon Champion, receiving the title after winning its first Pokémon League Conference.
As soon as he turned 10 years old, Ash rushed to Professor Oak's Laboratory to get his first Pokémon. Originally wanting to choose Squirtle, Ash ended up receiving the Pokémon Pikachu instead, as he arrived late (thus leaving him with no other Starters to choose from). At first, Pikachu did not obey Ash and kept running away, so Ash had to tie him up. After getting chased by a flock of Spearow later in the day thanks to Ash's recklessness, Ash attempted to save Pikachu from them. Seeing that Ash was so determined to help him, Pikachu protected Ash from the Spearow by electrocuting the entire flock (which was thanks to being struck by lightning at that exact moment and having his Electric-type move supercharged). From then on, Pikachu and Ash became best friends. As an unskilled trainer, Ash traveled with Misty and Brock throughout the Kanto region, capturing new Pokémon along the way.
Ash eventually managed to collect every badge from Kanto's Gym Leaders, allowing him to enter in the Indigo Plateau Conference. Since then, Ash has continued to travel, journeying through the various regions and making new friends such as Tracey, May, Max, Dawn, Iris, Cilan, Clemont, Bonnie, Serena, Lana, Kiawe, Lillie, Sophocles and Mallow. With each new region he traveled to, Ash continued to challenge all the Gym Leaders, entering Pokémon League Conferences and catching new Pokémon while still following his goal of becoming a Pokémon Master. Since this goal is so close to his heart, he sometimes acts a bit rash and rushes to the next battle he can as fast as possible without thinking.
While Ash was traveling, he was constantly pursued by Team Rocket's Jessie, James, and Meowth, who wanted his Pikachu. They chased him across all the regions so far, and are still chasing them to this day. Team Rocket never managed to capture Pikachu though, due to Ash's other Pokémon and friends helping him.
Ash is currently working at the Cerise Laboratory as a research assistant along with his new friend Goh while competing in the World Coronation Series.