The Pokémon coordinate system strikes again! When math teachers were going on about the x-axis and y-axis, some of us were secretly remembering it by Pokémon logic instead of actual math rules. Yveltal (the red flying one) belongs on the y-axis because it flies up , while Xerneas (the deer) stays on the x-axis because it walks horizontally . Nintendo accidentally created the best coordinate system memory hack ever! Who needs "x is horizontal, y is vertical" when you've got "X walks, Y flies"? Math teachers worldwide are probably facepalming right now.