It was xd
Still waiting for either a response to this or that lucky chance that someone puts a lugia up without asking for impossible or extremely endgame stuff (Usually both).
Also, while I'm here, can someone tell me how to access the Ultra Wormholes in U.Sun? I've only recently found out legendaries can be caught there, but I'm stuck either in Alola or in Megatropolis (Haven't defeated Necrozema yet), without the minigame.