To fight a Pokemon at the gym, you don’t have the same set up as the standard game. When you arrive in the arena you only have two move types – basic and special. In order to perform your basic attack all your need to do is tap away on your Pokemon. Fill up the special meter that you can see under your health bar and you can send out your special attack by holding your finger on your Pokemon. You’ll also need to dodge incoming attacks too, which is just a matter of swiping left and right on the screen.