Similar to previous Pokémon games, X and Y both follow a linear storyline whose main events occur in a fixed order. The protagonist of Pokémon X and Y is a child who had just moved to a small town called Vaniville Town with their mother. They soon befriend four trainers-Shauna, Tierno, Trevor, and their rival Calem or Serena, -all of whom were called to meet Professor Sycamore who is the leading professor in the Kalos Region in Lumiose City, the main city of Kalos. Receiving either Chespin, Fennekin, or Froakie as their starter Pokémon from Tierno, the player begins their adventure. Along the way, they learn of Pokémon Gyms and receive their first badge for defeating Viola, the Santalune City Gym Leader. Thereafter, they encounter Sina and Dexio, assistants of Sycamore, who brings them to the professor himself; however, once in Lumiose City they discover the area to be suffering from a partial power outage.