You can find or buy Digivolution Items (like the Grey Claws) that force an evolution regardless of stats. These are rare but vital for completing the Digivine encyclopedia.
The most straightforward requirement. Use the Training Gym to hit these targets.
Pay attention to your Digimon's "Family." Staying within the same family (e.g., Nature Spirits or Virus Busters) makes hitting stat requirements easier as the stat gains carry over more effectively.
Evolution from MetalGreymon. Requires massive Offense and Speed, and at least 40+ battles.
Some Digimon (like Devimon) require high Discipline (the "blue" bar), while others (like Angemon) require high Happiness (the "yellow" bar). Use the Scold and Praise commands carefully.
This stage is significantly harder. You will need to balance intense gym sessions with world exploration to trigger enough battles.
Requires maxed-out Speed and high Happiness.