Digimon Twin Evolution Requirements

Baby

To get YukimiBotamon:
Born from Egg

To get Nyaromon:
YukimiBotamon: Wait about 60 Minutes

Child

To get Agumon (R only) or Gaomon (L only):
Nyaromon: 0-1 Care Mistakes

To get Guilmon (R only) or Gabumon (L only):
Nyaromon: 2-3 Care Mistakes

To get Gotsumon:
Nyaromon: 4+ Care Mistakes

To get Agumon Hakase:
Nyaromon: 0-1 Care Mistakes
Must have been born from special event egg.

Adult

To get GeoGreymon (R only):
Agumon: 0-2 Care Mistakes, Train 25+
Agumon Hakase: 0-4 Care Mistakes, Train 12-24

To get Gaogamon (L only):
Gaomon: 0-2 Care Mistakes, Train 25+

To get Growmon: (R only):
Agumon: 0-4 Care Mistakes, Train 10-24
Guilmon: 0-2 Care Mistakes, Train 25+

To get Garurumon (L only):
Gaomon: 0-4 Care Mistakes, Train 12-24
Gabumon: 0-2 Care Mistakes, Train 25+
Agumon Hakase: 0-4 Care Mistakes, Train 12-24

To get Flymon:
Gabumon: 0-4 Care Mistakes, Train 10-24
Guilmon: 0-4 Care Mistakes, Train 10-24
Gotsumon: 0-2 Care Mistakes, Train 25+

To get Cockatorimon:
Gotsumon: 0-4 Care Mistakes, Train 10-24

To get Veggiemon:
All Child Digimon: When other evolution conditions are not met.

To get Wizarmon:
Agumon Hakase: 0-1 Care Mistakes, Train 25+
Must have been born from the special event egg.

Perfect

To get RiseGreymon (R only):
GeoGreymon: 0-1 Care Mistakes, Perfect Conditions met
Veggiemon: 0-1 Care Mistakes, Perfect Conditions met

To get MachGaogamon (L only):
Gaogamon: 0-1 Care Mistakes, Perfect Conditions met
Veggiemon: 0-1 Care Mistakes, Perfect Conditions met

To get MegaloGrowmon (R only):
Growmon: 0-1 Care Mistakes, Perfect Conditions met

To get WereGarurumon (L only):
Garurumon: 0-1 Care Mistakes, Perfect Conditions met

To get Anomalocarimon:
GeoGreymon, Growmon, Gaogamon, WereGarurumon: 2-3 Care Mistakes, Perfect Conditions met
Flymon, Cockatorimon: 0-3 Care Mistakes, Perfect Conditions met
Veggiemon: 2-3 Care Mistakes, Perfect Conditions met

To get Digitamamon:
From all Adult Digimon: 5 bombs (?)

To get Piccolomon:
Wizarmon: 0-1 Care Mistakes, Perfect Conditions met
Veggiemon: ???
This Digimon must have been born from the special event egg.

Ultimate

To get ShineGreymon (R only):
RiseGreymon: 0-2 Care Mistakes, Perfect Conditions

To get MirageGaogamon (L only):
MachGaogamon: 0-2 Care Mistakes, Perfect Conditions

To get Dukemon (R only):
MegaloGrowmon: 0-2 Care Mistakes, Perfect Conditions

To get MetalGarurumon (L only):
WereGarurumon: 0-2 Care Mistakes, Perfect Conditions

To get Pinocchimon:
Digitamamon: 0-4 Care Mistakes, Perfect Conditions

To get Minervamon:
Digitamamon: 5 Bombs (???)
This Digimon must have been born from the special event egg.

To get VictoryGreymon (R only):
Piccolomon: 0-1 Care Mistakes, Perfect Conditions
This Digimon must have been born from the special event egg.

To get Z'D Garurumon (L only):
Piccolomon: 0-1 Care Mistakes, Perfect Conditions
This Digimon must have been born from the special event egg.

Other

To get Burpmon:
Any Digimon: Weight above 80G. Burpmon cannot battle and will turn other Digimon into Burpmon during Event Communication. Burpmon will return to its previous form when its weight drops.

Perfect Conditions:
20 or more battles. A 40% Win Ratio gives a small chance of evolution, 60% gives a better chance, and 80% and higher gives the best chance. Event Communication is also required for evolution. 10-19 instances of Event Communication gives a small chance, 20-29 instances gives a better chance, and 30 gives the best chance.

Care Mistakes:
A Care Mistake is when the Digimon cries out for attention and the need is not met within a certain amount of time. On the Twins, this takes twenty minutes, unless the Care Mistake is for lights out at bedtime, as then only have five minutes. Note that the Strength meter will drop while the Digimon sleeps, making it important to train right when the Digimon wakes up to avoid a Care Mistake; you have twenty minutes after the Digimon wakes up before this counts. Accumulation of poop will not count as a Care Mistake.