Well guys I've been struggling on levelling up when i reached level 19, as you now need 25,000xp to get to level 20 and 50,000xp to get to level 21, but!! a quicker way to level up has appeared, The following strategy requires 1. lucky egg or eggs 2. 2km, 5km, 10km eggs 3. As many low level and high candy output pokemon as you can gather. Once you have the above your ready for max XP farming, I have a video to show how this is played out, what you need to do and how to do it, check it out guys and happy XP faming : https://www.youtube.com/watch?v=Z725xsjyddI