From Sonic Retro
|Series: Sonic Underground|
|First seen: [[Beginnings]]|
At some point, Bartleby became the fiancé of Sonia the Hedgehog. However the two split up after Bartleby started helping Dr. Robotnik. He would occasionally help Robotnik only to be betrayed in return.
|Sonic Underground characters|
|Main||Sonic the Hedgehog | Sonia the Hedgehog | Manic the Hedgehog | Dr. Robotnik | Dingo | Sleet|
|Recurring||Knuckles the Echidna | Queen Aleena Hedgehog|
|Others||Bartleby | Cyrus | Uncle Chuck|