While talking about Dr. Eggman, Sonic sings the words "the worst" in a similar way to Jean-Ralphio from Parks and Recreation (2009). This seems to be a reference to Ben Schwartz, the actor who played Jean-Ralphio, voicing Sonic in the live-action Sonic the Hedgehog (2020) movie.
While talking to Rad and Enid at the beginning of the episode, KO strikes poses resembling iconic Sonic poses from Sonic Adventure (1998) and the original Sonic the Hedgehog (1991).
This is the final full crossover episode in the series.
Lord Boxman referring Sonic as the "fastest thing alive" is a nod to the "Sonic the Hedgehog (1993)" theme song.
The Roboti-Making Machine is based off Dr. Robotnik's Roboticizing machine from "Sonic the Hedgehog (1993)", "Sonic Underground (1999)", and the aforementioned Archie comics. Sonic even makes the connection when he realized that KO's been "Roboticized".