Got this achievement by heading into a versus mode with 3 Level 1 CPU's. My first plan was to use Latch, keep the ball to myself until i got my Special Move and use it next to all 3 CPU's. However, I just got lucky before I could even use that plan! Hit the ball off an odd angle and managed to hit all 3 of them! With 3 Level 1's it shouldn't take too long!