Axew’s sprite needs to be fixed. That giant crown and white background are really awkward.
Going through all of the Axew sprites, from the battler/icon/overworlds, there was not a single one I could find that had anything that looked remotely like a giant crown or a white background on them. Either you have your own sprites in for some reason, or your files got edited in some way, but that is not present in any of the current sprites I have for a dev based build of the game.