|This character exists primarily within the Adventures of Sonic the Hedgehog continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
According to a flashback by Lucas shown within, they were lab partners in high school, Robotnik didn't take kindly to this, as he also had unrequited romantic feelings for Lucinda. When he attempted to "take care of" Lucas using a robot snake and promise Lucinda "a quarter of everything he would plunder", Lucinda refused and it only got him expelled. After building his fortress, Robotnik imprisoned Lucas.
The episode opens with Sonic and Tails breaking into Robotnik's fortress thirty years later to rescue Lucas, who now resembles a walking haystack due to the fact that he's never had a haircut during his imprisonment. Furious with this, Robotnik orders Scratch and Grounder to go recapture "that hairball", claiming that Lucas ruined his romance with Lucinda. Robotnik is apparently in denial about what happened, as he later refers to Lucas as "Lucinda's true love" right in front of Scratch and Grounder, which causes some confusion to them as they still believe his earlier claim.
Lucinda, meanwhile, has been teaching a kindergarten class in a nearby jungle - something that Robotnik is aware of (and thus has never used to his advantage). Lucas and Sonic, on the other hand, do not know this until Grounder accidentally blurts it out to them. After recapturing Lucas and trying to trap him in a volcano, Robotnik heads for the schoolhouse to propose marriage to Lucinda, not knowing that she's not there. Sonic tricks him by pretending to marry Robotnik himself, while Tails gives Lucas a haircut. Afterwards, Sonic gets Lucas to propose to Lucinda, and at their (quickie) wedding, Sonic serves as the best man (hence the episode's title).
It should be noted that, although Lucinda does look older in the present than in the flashbacks, she looks rather young for someone who is most likely in her 40s, and Lucas does not look any older in the present than he does in the flashbacks. Observant viewers will also notice that, while covered with his own hair, Lucas does not seem to be wearing a shirt, pants, shoes, or glasses, and his eyes are the same shape as Sonic's; but after his haircut, he is suddenly dressed in all of those clothing articles without any explanation. Lucas also bears a few similarities in appearance to Waldo, from the "Where's Waldo?" books. while covering with his own hair, resembling Gossamer from the "Looney Tunes" cartoons.