After reaching Trainer Level 5, trainers can interact with a Pokémon Gym to choose a team. Professor Willow will introduce you to his three assistants, each leading one of three teams you must choose to join.
The leader of Team Mystic, Blanche, studies Pokémon evolution and claims they cannot lose with their utilization of calm analysis.
"I am Blanche, leader of Team Mystic. The wisdom of Pokémon is immeasurably deep. I am researching why it is that they evolve. My team? With our calm analysis of every situation, we can't lose!"
Team Mystic, also known as the Blue Team, has their logo styled after the legendary bird Articuno.
Team Valor is lead by the Candela, who values training and strength. Candela is researching ways to enhance Pokémon's natural power as she tries to find true strength.
"I am Candela-Team Valor's leader! Pokémon are stronger than humans, and they're warmhearted, too! I'm researching ways to enhance Pokémon's natural power in the pursuit of true strength. There's no doubt that the Pokémon our team trained are the strongest in battle! Are you ready?"
Team Valor, also known as the Red Team, has their logo styled after the legendary bird Moltres.
Team Instinct is led by Spark, who believes you will never lose when you trust your instincts. Spark studies Pokémon's intuition and thinks that it's related to how Pokémon are hatched.
"Hey! The name's Spark-the leader of Team Instinct. Pokémon are creatures with excellent intuition. I bet the secret to their intuition is related to how they're hatched. Come on and join my team! You never lose when you trust your instincts!"
Team Instinct, also known as the Yellow Team, has their logo styled after the legendary bird Zapdos.
Currently, the only game effects of teams is the team players can join Gyms with and battle against, and also the team leader guiding Pokémon Appraisal. There have been teases and leaks of further information, such as competitive events for legendary Pokémon and other team-based challenges.