What is an ally? Well, mostly it's a friend. Allies are the only ones you can team up with in an Ally Battle. Note you can only change allies once a day (This is to prevent people from allying to battle, then un-allying afterwards). Also, you can give things to an ally in the same location as you. Gold, items, even lessons! You can give them pretty much anything but techniques and stats, so start sucking up to your allies guys!