Instructions
Turn your Digimon Twin on. You should now see the special event egg on your twin's screen. This egg will automatically hatch after one minute, giving you a YukimiBotamon.
Care for the YukimiBotamon for 60 minutes. After this time has passed, the YukimiBotamon will evolve into a Nyaromon automatically. After this, wait for the Nyaromon to call out for attention (this usually happens after 20 minutes, but may take longer).
Select the "Care" option in the Twin's main menu. The Twin will automatically care for the Nyaromon based on what it needs (for example, if the Nyaromon is hungry, the twin will automatically feed it). After the Nyaromon is cared for, it will evolve into a Agumon Hakase. This particular Digimon can only come from a special event egg. Continue to care for the Digimon, and it will evolve into other unique forms.