Gyms in Pokémon GO are the source of Pokémon vs Pokémon battle. A gym can come in 3 states: Neutral, Enemy and Team owned and range from Level 0 (Neutral) to Level 10 (max). As the level of a gym increases the prestige (strength) and amount of Pokémon it can hold increases. You must be Level 5 to interact with Gyms.
Types of Gyms
Neutral gyms can be captured for your team by adding a Pokémon to the gym. This Pokémon will be pulled from your collection and only returned after it is knocked off the gym.
Enemy gyms can be fought. While attacking you can use 6 Pokémon at a time to defeat the gym.
Each Pokémon defeated will help lower the prestige. As prestige gets lower the level of the gym will drop until it is neutral. You can team up with other trainers (up to 20) and battle at the same time to more quickly take down an enemy gym.
Friendly gyms can be trained at. Training helps to increase the prestige, thus boost the level of the gym.
During training you can bring 6 Pokémon.
Each Pokémon defeated during training will add prestige points to the gym. If the prestige causes the gym to increase in level you may add another Pokémon to the gym making it stronger. The table below shows the gym level in correlation to the prestige points.
Gym Level & Prestige Points
|Gym Level||Prestige Points|
You can push the prestige to 52,000, but it does not push the level of the gym past level 10.
Battling Prestige & XP (enemy gym)
|Prestige Removed||XP Earned|
|Each Pokemon defeated||1,000||100|
|Defeating all Pokemon bonus (winning)||1,000||50|
Training Prestige & XP (friendly gym)
If you default a Pokemon with higher CP than the Pokemon battling it, you earn more prestige and XP! Keep in mind, this is only the case at friendly gyms.
|Prestige Earned||XP Earned|
|Attacker CP > Defender CP||310 * (Defender CP / Attacker CP) – 55||31 * (Defender CP / Attacker CP) – 5|
|Attacker CP < Defender CP||500 * (Defender CP / Attacker CP)||50 * (Defender CP / Attacker CP)|
You will always gain at least 100 prestige as the minimum, and 1,000 as the maximum.