Here is the full list of all 13 WOWOWOW KORONE BOX achievements.
Defeat ??? on Hard Mode.
Reach a score of 36.
Reach a score of 48.
Get hit by a frisbee.
Collect 250 Korone Boxes.
Collect 120 Korone Boxes.
Reach a score of 24.
Game over without collecting a single Korone Box.
Collect 50 Korone Boxes.
Reach a score of 12.
Collect 20 Korone Boxes.
Game over.
Collect 5 Korone Boxes.