Can we change the name of the digimon we have?
Are skill level related to the frequent use of skills?
The name change item is Available through the Cash shop Under the Digimon > Special section
Skill levels do relate to how much you use a skill yes, everytime a skill level increases you gain a number of skill points which can be used to upgrade skills
The skill points you gain via level up can be used to upgrade any skill so you can max out either skill, you gain 27 points per skill I believe separated like this
You need 16 Points to max out Skill 1 and 24 points to max out skill 2