I was playing Pikachu against a Fox com when this happened. So I hit him off the right side of the stage and was about to recover. I used Up+B in a 120-135 degree direction (counterclockwise starting from the right) and jammed the control stick straight left. My Pikachu did the first teleport normally, appearing a little bit above and to the right of the stage. What happened next was so fast I didn't quite catch it, because I wasn't expecting it. I heard a weird sound, possibly a double teleport (making it a triple teleport total), and my Pikachu went straight left and WAY off the left side of the stage. It was either a double teleport to the left or a super long teleport glitch. I'm not sure exactly what happened, and if this is new or not.