Instructions
Check a "Digimon" monster evolution guide online to learn the requirements you need to fulfill to evolve your monster. These requirements usually include specific levels you must obtain or items you must find.
Fight against other "Digimon" trainers using the monster you want to Digivolve. Fight until you earn the Bronze rank as a trainer. You can Digivolve once you reach this rank.
Send your monster to the gym to raise its statistics. Send multiple monsters to the gym at the same time to prepare multiple Digimon for evolution.
Open the "Digivolving" game screen and select the monster you want to Digivolve. Make sure you have met all requirements before Digivolving, including having high enough statistics and any items you need. Select "Revert to egg" to begin the process.
Take care of the egg until it hatches, giving you a new, more powerful monster. Repeat the Digivolution process one more time to get the higher level monster you need.
Fight battles using your Digivolved monster as the main fighter. Your monster will evolve randomly into a Mega Digimon during a battle.