Locked Digimon's Evolution

When you get a new digimon from hatching digi-egg, you will notice that your new digimon's evolution is locked, whether in ultimate stage or mega stage. However, if you are very lucky, you won't see this problem and your digimon can digivolve all the way up to mega stage.

Two pictures above show that the ultimate and mega stage is locked. Don't worry about why the mega stage is like locked forever. It will change its picture when you have opened the ultimate stage. To unlock them, you will need item called evolutor. The item is looked like this :


You will need 3 to unlock the ultimate stage and 6 to unlock mega stage.