Mega Evolution Raichu Wallpapers. If raichu's sacs are fully charged, its ears will stand straight up and its. 1052 phone wallpapers 339 art 354 images 1086 avatars 288 gifs. Mega Raichu by AlouNea on DeviantArt from alounea.deviantart.com 1052 phone wallpapers 339 art 354 images 1086 avatars 288 gifs. Remove 4k ultra hd filter. In the core series, mega evolution requires the player to hold a key stone and a pokémon capable of mega evolution holding its compatible mega stone (except.