‘Pokémon GO’ wants you to spend your hard-earned cash on Pokécoins, but there’s a pretty simple way to earn them for free.
You'll have to be above level 5 to take advantage of this, because it requires that you have one of your Pokémon defending a gym that your team controls.
To do this, you'll have to leave one of your Pokémon behind to defend a friendly gym -- one that's controlled by the team you belong to. There are two ways to do this.
Once you win enough battles at a friendly gym, you'll raise its Prestige level. The gym's level directly corresponds to how many Pokémon are guarding it. In this case, the gym is level 3, so it has 3 Pokémon guarding it.
Once you level up your gym, there will be a free space where you can place a Pokémon to defend your gym against rival teams.
By totally defeating an enemy gym, you will be able to leave a Pokémon behind to defend the gym that's now controlled by your team.
If you choose this method, go for a gym that has a relatively low level so you only have to defeat a few Pokémon and be sure to check out our full guide to battles in 'Pokémon GO.'