After a talk with Duck, Melvin decides to shrink it. When Lexi admitted tampering with Tech's invention, Melvin ordered the Loonatics to hand her over to him in 24 hours or "the planet will be hard to find on any map." Lexi ended up surrendering to Melvin and the Loonatics get her back using an idea from Rev-to create a Trojan horse. Meanwhile, Lexi faces off against Melvin in a game of Celestial Checkers (while Melvin is secretly having his warships shrink the rest of Acmetropolis); he also attempted to blow up Ace with a Uranium PU-36 Explosive Space Modulator (Marvin also used an Illudium PU-36 Explosive Space Modulator) but got his helmet blown off instead after arguing with him over who would get it. Ace, Duck, Rev and Slam rescue Lexi, restore Acmetropolis, and defeat Melvin who escapes with his dog Sergeant Sirius. A robotic version of K-9, Sergeant Sirius is Melvin the Martian's dog and can fly. His name is a reference to Sirius. He is a villainous descendant of Porky Pig, who grew up in the same orphanage as Danger Duck. When it came to adoption, Pinkster suggested a coin toss to determine who would be adopted first and Duck won, with Pinkster saying that he did not give up on his dreams like working as a scientist and police officer. He first appeared trying to stop criminals Stoney and Bugsy, but ended up crashing into the Loonatics. Reunited with his old friend Duck, Officer Pinkster was allowed to join them in trying to stop Stoney and Bugsy. Seemingly due to clumsiness, though, Pinkster kept letting the villains get away. It was later revealed that Pinkster was really Stoney's and Bugsy's boss, alias Pink the Pig, and was ruining the Loonatics' attempts on purpose. Pinkster also mentioned that he was destined for this life, had manipulated Duck into using a two-faced coin, and was later adopted by Stoney and Bugsy. Ace proves to have already figured Pinkster out by researching the jobs Pinkster claimed to have had. When the Curium 247-to which Ace was exposed by Pinkster—turned out to be fake, Pinkster ended up defeated, though Duck still hoped that Pinkster could be reformed. In the tradition of his ancestor, Pinkster ended the episode in his own way by talking to the viewers, saying "This ain't over, folks!"