In Pokemon X and Y, Serena is a Pokemon trainer who, along with her Pokemon Fennekin, accompanies Ash Ketchum on some of his travels. She is a kind girl but openly rebels against her mother.

Ash Ketchum has always dreamed of becoming a Pokémon Master and as soon as he turned ten he obtained his first Pokémon, Pikachu. Together with his friends Misty and Brock, he’s learned to improve his skills and capture more Pokémon.

In the Pokémon: Indigo League episode, “The Battling Eevee Brothers,” Ash (Veronica Taylor / Rica Matsumoto) and his friends come upon four brothers trying to convince the youngest how he should evolve his beloved Eevee. Each of the elder brothers has one of the original Eeveelutions: Jolteon, Flareon, and Vaporeon. Their hair and pants reflect which Pokémon specific element/type their Pokémon is now affiliated with.

Are you a boy? Or are you a girl? Professor Oak is the very first Pokémon Professor you meet in the wonderful world of Pokémon. He’s forgetful, unable to remember the name of his nephew in games and he’s always around to remind you that you can’t use a bike in the ocean. However, he is an indispensable companion to Ash (and, really, all trainers).

Pikachu is by far the most popular of all Pokemon, and the most loyal, never leaving Ash Ketchum’s side. This pika-like creatures has a thunderbolt tail and can emit sparks of electricity from its cute red cheeks.

In Pokemon Go, Professor Willow introduces beginner trainers to the game by giving them their first pokeballs, and experienced trainers a shot at catching Mew. With his silver fox looks and toned physique, any Pokemon trainer would be happy to follow Professor Willow’s orders.