as your discussion Is closed now ill talk here.
so there is a color on the sprite editor (the one that is usually black with an x on it or something..) this is the neutral color so its nothing at all, I am guessing you mistakenly used just black to fill it in or something idk.. anyways try filling the black around the edges with neutral also try changing the neutral color to something lighter to
1そうだね プレイ済み