Xerneas

You walk around the forest with your pokémon Sylveon by your side. You heard the rumour that Xerneas, the legendary pokémon of life, was seen near a river. You look around the forest, holding your pokédex with the map on the screen on your right hand and one of Sylveon's feelers around your left wrist. You soon reach the river and look around. You see behind a tree a bushy tail. It is hard to see it clearly. You think if you should to go to the other side of the river.