Wallpaper
The following additional wallpaper can be obtained for your Pokemon storage boxes in the PC by completing the corresponding task.
Unlock Kyurem 1, Kyurem 2, Reshiram, and Zekrom Wallpapers:
Catch Kyurem.
Unlock Monochrome, Movie, PWT, and Team Plasma Wallpapers:
Defeat the Elite 4 and Champion.