My Null had max affection and max enjoyment. Then I leveled it up, but it wouldn't evolve. Why? (And how can you get to the fly spot {Which is basically where you are when Charizard flies you somewhere} at Aether before battling Lusamine?)
Type: Null evolves through happiness, not affection and enjoyment. Happiness, unlike affection and enjoyment, is not gained through Pokemon Refresh. Instead, happiness is gained through various things, such as walking with your Pokemon in your party, your Pokemon winning a battle, or giving your Pokemon a friendship raising berry.
