|This character exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Karl, Jeff and Konor are a trio of weasels who worked for Nack the Weasel.
Karl, Jeff, and Konor joined Nack in his kidnapping of Sally Acorn, holding her hostage in hopes of getting a ransom for her safe return. However, the gang was thwarted by Sally's ingenuity in fooling their leader and by the subsequent arrival of the other Freedom Fighters. All four Weasels were arrested, but when Nack was next seen, Karl and the others were nowhere to be seen. Following another escape from prison coinciding with that of the Destructix, Nack apparently decided to poison his old lackeys to make sure that no loose ends remained.
- In Sonic the Hedgehog #163, Nack states he planned to "Hit the kitchen on my way out and leave my former gang buddies a little 'gift'". Because it was not specified in the issue clearly, writer Ian Flynn elaborate in a Q&A that Nack poisoned the prison food, thus killing off his cousins.
- Karl, Jeff, and Konor were never named during their appearance in the comic, but the names were given in a story script. They are named for the writer, artist, and inker of their debut arc respectively. These names were made canon with the release of the Sonic the Hedgehog: The Complete Sonic Comic Encyclopedia.