Is there any benefit to leaving a Pokemon with 2 moves at a gym? Will the AI make the better move for the situation?
Answer
Actually, at this moment, the second move does not work on gyms (if you’re defending), it only works when attacking in every setting of the game, if your Pokemon knows two moves and is defending a gym, it will use the first one it has.
Attribution
Source : Link , Question Author : Styxsksu , Answer Author : Aarón Gutiérrez