Special Background Shiny & Max IVs, and a Very Assertive Background (-_-;)

Everyone, how was the Mega Finale? I had a Fennekin with max IVs, so I chose Delphox for the GO Pass (・∀・). Then I got a shiny Fennekin with max IVs and a special background (≧▽≦). I also caught a Mewtwo with a special background, but the background is really aggressively prominent (-_-;). It's strange because other Pokémon don't get special backgrounds, but only Mewtwo's special background is so insistent (´-﹏-`；). By the way, I got 3 shiny Mewtwo, but no special backgrounds (╥﹏╥). How about you all? Please comment if you'd like (•‿•)