Digimon Twin Evolution Requirements
***Baby I***
To get YukimiBotamon:
Born from Egg

***Baby II***
To get Nyaromon:
Botamon: Wait about 60 Minutes

***Child***
To get Agumon (R only) or Gaomon (L only):
Nyaromon: -1 Calls

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

To get Gotsumon:
Nyaromon: 4+ Calls

To get Agumon Hakase:
Nyaromon: Must have been born from special event egg, 0-1 Calls

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

To get Gaogamon (L only):
Gaomon: -2 Calls, Train 25+

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

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

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

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

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

To get Wizarmon:
Agumon Hakase: -1 Calls, Train 25+
This Digimon must have been born from the special event egg.

***Perfect***

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

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

To get MegaloGrowmon (R only):
Growmon: -1 Calls, Perfect Conditions met

To get WereGarurumon (L only):
Garurumon: -1 Calls, Perfect Conditions met

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

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

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

***Ultimate***
To get ShineGreymon (R only):
RiseGreymon: -2 Calls, Perfect Conditions

To get MirageGaogamon (L only):
MachGaogamon: -2 Calls, Perfect Conditions

To get Dukemon (R only):
MegaloGrowmon: -2 Calls, Perfect Conditions

To get MetalGarurumon (L only):
WereGarurumon: -2 Calls, Perfect Conditions

To get Pinocchimon:
Digitamamon: 0-4 Calls, 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: -1 Calls, Perfect Conditions
This Digimon must have been born from the special event egg.

To get Z'D Garurumon (L only):
Piccolomon: -1 Calls, 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.