Level-up an item

For this achievement, you will need to level up an item. You can level up an item under Dress Up and Power Up, and then by choosing Item Level-Up. In order to level up an item, you will need other items to use as materials as well as the required amount of Happy Stars.

To level up your item, choose the item you want to level up, and then choose the items you wish to use as materials.

As long as you have enough Happy Stars to perform the level-up, you will obtain your achievement.