The Digivolution system of this game is the same as the one for the v-pet and pendulum Digivices. Check out File Island guide for evolution methods.
Buy the free egg from shop to get Version 1 Egg. Other eggs unlock as you defeat the Virus,Data and Vaccine arena.
Botamon
The First Digimon You will get no matter What.whether you train it or not he will always digivolve to Koromon.
Koromon
This is the digimon that gives you the hardest training point almost Ever! Usually for some reason you will likely end up with Betaman some people like that one but most would like an Agumon but most are really unsure.
Betamon
This is the digivolution form of Koromon. Evolves with 4+ Care Mistakes
Agumon
This is the digivolution form of Koromon. Evolves with less than 3 Care Mistakes.
Greymon
Evolution from Agumon only with 0-3 Care Mistakes, Train 32+
Greymon
Evolution from Agumon only with 0-3 Care Mistakes, Train 32+
Tyranomon
Agumon: 4+ Care Mistakes, Train 5-15, Overfeed 3+, 0-4 Sleep Disturbances
CARE MISTAKE LIST
1. If you don't feed it for 20 minutes, when it calls you 2. If you don't train it (or feed pills) for 20 minutes, when it calls you 3. Leaving the lights on for 20 minutes after the Digimon falls asleep
SLEEP DISTURBANCE
1. different from care mistakes, a few digimon needs lots of sleep disturb to evolve (such as Airdramon)