Okay these are the rules when battling a Gym Leader:
 If the gym asks for a Two on Two that means you only use two Pokemon
 The Gym Leaders will be someone you have not contacted or Vice Captain and Captain
 Gym Leaders Pokemon are strong even if you have a type advantage over the gym’s pokemon that doesn’t mean that you will win easily
 These battles are to test you and are not suppose to be easy
 You can challenge the Gym as many times as you want even if you win but if there is a challenger who hasn’t won or even challenged the Gym then you’ll have to wait
 If you will leave in the middle of the battle PM or message the person you are battaling
 The gym will have certain rules and you must follow those rules
 If you break the rules you will be disqualified in that match
 I will add more rules later (Hope the Kind not me)