Version 1 Version 2 Version 3 Version 4 Version 5

Version 1

To get Botamon:
Born from Egg
To get a Koromon:
Botamon: Wait about 60 minutes.

To get Agumon:
Koromon: 0-3 Calls.
To get Betamon:
Koromon: 4+ Calls.

To get Greymon:
Agumon: 0-3 Calls, Train 32+.
To get Tyranomon:
Agumon: 4+ calls, Train 5-15, Overfeed 3+, 0-4 Sleep Disturbances.
To get Devimon:
Agumon: 0-3 Calls, Train 0-31.
Betamon: 0-3 Calls, Train 48+.
To get Meramon:
Agumon: 4+ Calls, Train 16+, Overfeed 3+, 0-6 Sleep Disturbances.
Betamon: 0-3 Calls, Train 0-47.
To get Airdramon:
Betamon: 4+ Calls, Train 8-31, Overfeed 0-3, 9+ Sleep Disturbances.
To get Seadramon:
Betamon: 4+ Calls, Train 8-31, Overfeed 4+, 0-8 Sleep Disturbance.
To get Numemon:
Agumon/Betamon: When you do not fulfill the requirements of other Digimon.

To get MetalGreymon:
Greymon/Devimon/Airdramon: Fight 15+ battles with a victory ratio 80% or more. (unconfirmed)
To get Mamemon:
Tyranomon/Meramon/Seadramon: Fight 15+ battles with a victory ratio 80% or more. (unconfirmed)
To get Monzaemon:
Numemon: Fight 15+ battles with a victory ratio 80% or more. (unconfirmed)

V-Pet Version 1 Evo Chart
Click to Enlarge

For reference:

  • The counters are reset when the Digimon evolves. So, for example, nothing that happens to the newly hatched Digimon affects growth at all.
  • The requirements for Perfect Digimon are unknown at this time. Some battles are necessary.

  • ***Calls / Care Mistakes***
    For food and strength calls:
  • When its hunger hearts run out, the call icon lights up. If you don't feed it for 20 minutes, it goes out again, and that's a care mistake. The same for strength. However, if BOTH hunger and strength run out, it's still only one care mistake. And if you leave it for a few hours before feeding it, and it bleeps again a few times, then even then it's only one care mistake.
  • Lights calls are straightforward - leaving the lights on for 20 minutes after it falls asleep is a care mistake.
  • Accumulating up to 4 piles of poop has no effect at all. (Larger quantities are unknown.)

  • ***Training***
  • A training session is counted whether or not you complete all 5 rounds. It's counted if you win, if you lose, or even if you cancel in the middle. (Where there's an upper limit on the training requirement, be careful of this.)

  • ***Overfeeding***
  • To overfeed, stuff the Digimon with food until it won't eat any more. It is necessary to wait until it loses a hunger heart before overfeeding it again.

  • ***Sleep Disturbances***
  • Wake the Digimon up by going into the Food menu, training it, or selecting the Battle option.
  • If you want to wake it, without this being counted as a wakeup, then set the clock to some time during the day. The Digimon will wake up, with no effect on the counters.