"Momma Robotnik Returns" is the thirty-second episode of the Adventures of Sonic the Hedgehog television series. Despite being produced as the thirty-second episode, it originally aired as the twenty-second episode during the show's original run.
Momma Robotnik escapes from the Mobius Home for Really Bizarre Mothers and hijacks a milk hovertruck to find her son, Dr. Robotnik, failing to defeat Sonic with a transforming, fire-breathing car. Momma takes Robotnik back to his hilltop fortress and "cleans house", starting with Robotnik. She officially disowns Robotnik and adopts Scratch and Grounder as her sons. Coconuts joins her too wanting to get off sewer patrol. She takes Coconuts in and assigns him back to sewer patrol.
Later that day, Sonic and Tails are seen hanging around when a beaver on a penny-farthing delivers a paper to Sonic saying that someone wants to adopt him. At court, Sonic states his disapproval of being adopted, but his objection is overruled when it is learned that Sonic isn't an adult. It turns out that the adopter is Momma Robotnik (in disguise), making Sonic, unable to fight the law, her adoptive son. To convince Sonic further, Scratch and Grounder kidnap Tails behind everyone's back, whom Momma threatens to drop down a bottomless pit if Sonic doesn't obey her orders.
In the Robotnik home, Sonic is forced to do numerous chores (with Scratch and Grounder sent by Momma to cause trouble for Sonic) while Momma harasses all of Mobius with a device that controls all of the machines on Mobius. That night, Coconuts, on sewer patrol, is recruited by Robotnik, who is determined to get his fortress back. The next day, Miss Sniffed, the adoption case worker abruptly arrives at the Robotnik residence to check up on Sonic's progress. Robotnik arrives and reveals to Miss Sniffed that he was disowned by Momma, knowing that no one who disowns their child can adopt another. To confirm that Robotnik is indeed Momma's son, Sonic remove's Robotnik's mustache and places it on Momma, who looks exactly like Robotnik. With the adoption of Sonic the Hedgehog annulled, Momma orders Scratch and Grounder to eliminate everyone around her, but ends up destroying Robotnik's super computer, and is soon sent back to the Home for Really Bizarre Mothers.
Since Tails flew in a "no fly zone" he is taken to court. The Judge rules that Tails cannot fly for a whole month. Sonic explains that laws are there for a reason and you have to obey them to avoid going to court.