He is often called Most Notorious One.
A user of official Rainbowtail forum suggested a theory about could Darktail become good and Sketchi, a staff of Minidragon willed not response on that theory.
- According to the quiz Which Rainbowtail character are you? created & shared by the official Rainbowtail Facebook page, he is one of 5 possible results with given reason: "You're Darktail! You don't mind breaking a few rules (or all of them) on the way to getting something you want. You don't have friends, you have minions. Nobody can truly understand you."
- Before unspecified date of legacy version, the level the player let him free was 1-3 Breaking Out!.
- Darktail got his evilified transformation since the legacy version 2.8.3.