Instructions
Go to the Digifarm from the game's main hub. You will be presented with several options pertaining to your Digimon.
Click "Digimon list." A list of your available Digimon will be displayed.
Scroll through the list and find a Digimon you believe is strong enough to evolve. Criteria for evolving is largely based on the Digimon's current health and level.
Click "Check Status" to view the individual properties of the Digimon.
Click "Digivolution Route" to view the Digimon's various evolutionary forms.
Press the "X" button to evolve the Digimon. An error message will be displayed on the screen notifying you the evolution process failed if your Digimon is not eligible for evolution.