How do you attack a rival Gym?
The attacking process in Gyms is pretty straight forward.
1. Approach a Gym until you're within range. It has to be controlled by a team other than your own.
2. Tap on the Gym.
3. Tap the Battle button.
4. Tap a Pokémon to swap it out for a different Pokémon. (One better suited to counter the rival Pokémon)
5. Tap on Go Battle.
6. FIGHT!
7. Tap to attack with a Quick Move.
8. Touch and hold to attack with a Charge Move. (When the charge meter is full.)
9. Swipe left or right to dodge an attack.
10. Tap the Quit button, middle right, to abandon the fight. (Looks like a runner.)
11. Tap the Swap button, bottom right, to switch Pokémon during a fight. (Looks like up and down arrows.)
The battle continues until your six Pokémon lose all their CP, or you run out of time and lose, or all the defending Pokémon lose all their CP, are defeated, and then lose some Motivation.
How do you kick Pokémon off the Gym?
If a defender's motivation is already empty, you can kick it off after one battle. If its motivation is full, though, you have to first empty it, then you can kick it off.
If no one is feeding it while you attack, a Pokémon with full motivation takes three battles to kick from a Gym.
