Dennis tries to reunite his family by buying and fixing up Ludo's castle.
Tropes:
- Aborted Arc: The end of "Ludo, Where Art Thou?" heavily implied Ludo was plotting to confront Star and Marco again. In this episode, it turns out Ludo went back to trying to steal magical power, but shows no signs of personally caring about either of them.
- Alternate Universe: Ludo begins the episode in one, trying to steal the magic bell of a princess called Quasar Caterpillar. As one can see, Quasar and her friends are versions of Star and company. Ludo himself assumes the guise of an alternate Bon Bon the Birthday Clown.
- Ambiguously Brown: Just like his original counterpart, Shmarmo's complexion is visibly quite dark.
- Aristocrats Are Evil: Literally in case of Evil J. LandBaron III.
- Asshole Victim: LandBaron swindled the trusting Dennis out of his family home and fortune then later mocks him about it, so it's hard to sympathize when Ludo has him devoured to get the deed back.
- Badass Boast: Ludo gives a good one to the Baron. It loses some of its appeal when he mistakenly accuses the Baron of having the wand, but it's still quite impressive.Ludo: You're probably wondering who I am. So let me introduce myself: I have waged war on the Butterfly family for years. I burned the Magic Book of Spells to ashes. I've fused with the most powerful relic in existence. I amassed an army large enough to conquer this wretched land. I'm Ludo Avarius! And you have my wand!
- Bait-and-Switch: Ludo rants early on about how he'd sneak into Eclipsa's room, disable her, and steal her wand. Near the end, he takes up his old costume, breaks into someone's bedroom, and rants about stealing the wand... only for the camera to reveal he's threatening the landlord and only mentioned the wand out of habit.
- Black Comedy:
- One monster is accidentally knocked inside the iron maiden he showed Ludo. However, he doesn't seem to be harmed as he reappears less than 20 seconds later.
- Ludo tells Dennis that LandBaron's heart is in a better place now. That "better place" being Eagle's stomach.
- The Bus Came Back: The monsters Dennis hired were Ludo's former minions who survived the castle explosion and who haven't left Mewni with Buff Frog. Also, Ludo and Dennis' siblings appear at the end to rebuild Castle Avarius.
- Card-Carrying Villain: Not only the landlord is called Evil J. LandBaron III, he also laughs at Dennis when he mentions his belief on "the best of people".
- Chronic Villainy: Ludo tries to give up his power-grabbing ways — if not for moral reasons, then because he knows he'll end up worse for it — but struggles with it, especially when his former minions are egging him on.
- Cold Turkeys Are Everywhere: Just when Ludo has sworn off his obsession with the wand, Dennis takes him back to his old castle and reveals he hired Ludo's old minions who survived the initial explosion. To better distance himself from his past, it's likely Ludo made them take a hike later on and convinced a number of his siblings to help rebuild the castle instead.
- Cyclops: Hanna, the Alternate Universe version of Janna, looks exactly like the regular one, saving for having only one eye.
- A Day in the Limelight: This episode follows up on Ludo and Dennis and what they've been up to since the previous season.
- Deadly Euphemism: When Dennis questions how Ludo got the castle back from the Baron, he responds "His heart is in a better place now". Eagle then coughs up the Baron's gold chain. Dennis doesn't notice.
- Deconstructed Trope: Dennis may believe that everyone has good in them and that's not necessarily a bad thing. But in the case of LandBaron III, that doesn't automatically make everyone dependable or trustworthy.
- Earn Your Happy Ending: After spending the past seasons struggling to find himself, Ludo finally moves on from his obsession with the wand, reconciles with his siblings, and takes back ownership of his castle, no longer having to worry about his parents. The end of the episode has him playing basketball with Dennis, with the scoreboard reading Ludo vs the Forces of Evil.
- Fake-Out Opening: The episode begins with Alternate Universe versions of Star, Marco, Janna and Jackie in a plot similar to "Bon Bon the Birthday Clown". Ludo attacks them, then is sent back to his dimension, where the real story begins.
- Fed to the Beast: LandBaron's fate at the mouths of Spider and Eagle.
- Fembot: Skackie, the alternate Jackie Lynn Thomas.
- Freudian Slip: Whenever Ludo demands something, he keeps calling whatever it is a "wand" out of habit.
- Furry Confusion: The landlord is a human-sized, anthropomorphic rat. Ludo's rat minions in Season 2 looked like ordinary rats, except they were cat-sized, weren't as sapient and didn't talk.
- Knight Templar Big Brother: Ludo goes full on psycho defending his little brother from the crooked landlord, and ends up having him eaten.
- Locked Out of the Loop: Apparently Ludo never learned that Eclipsa was alive all along or that she is the new Queen and wandholder.
- Mugging the Monster: Conning out of the entire family fortune from the cherished little brother of an Axe-Crazy former Evil Overlord who once took over the entire Kingdom of Mewni probably wasn't LandBaron's smartest move.
- Mundane Utility: The giraffe monster held on to the portal generator so he can pick his nose, since his arms are too short to reach his face.
- Never Trust a Title: The title misleads you into thinking that it'll be about a magical space princess named "Quasar Caterpillar" when in truth the real story is about Dennis trying to bond with Ludo again.
- Noodle Incident: From the end of Ludo, Where Art Thou? to the present, Ludo became a recurring antagonist towards Princess Quasar Caterpillar and her circle of friends.
- Obviously Evil: The landlord is named Evil J. LandBaron III, a dead giveaway that the guy was a swindler who was going to dupe a gullible Dennis into signing their land and fortune away to him.
- Read the Fine Print: In this case, the contract was all fine print. Because Dennis didn't read the contract before signing it, he had no idea he was ceding all rights to their family's castle and their entire fortune to the landlord.
- Restored My Faith in Humanity: Or in Dennis's case, "Restored my Faith in Monstrosity". Dennis lost his idealistic outlook on "the goodness in everyone" when not only did Ludo go back to his old ways, but Landbaron swindled him out of the castle and their family fortune. But his idealistic view returns once he sees not only Ludo turn over a new leaf and thier property returned, their other siblings (the very ones permitted by thier parents to "toughen up" Ludo) help rebuild the castle.
- Rule 63: The Alternate Universe version of Glossaryck is a small magic woman named Indexia.
- Sdrawkcab Name: The alternate universe version of Bonbon is named Nobnob.
- Sequel Episode: Revisits Dennis and Ludo after "Ludo, Where Art Thou?".
- Similar Squad: The dimension Ludo starts the episode in has equivalents to several characters from Earth and Mewni, some of which are quite strange.
- Star Butterfly's equivalent is Princess Quasar Caterpillar, who is mostly the same only black and with a sci-fi theme.
- Marco's equivalent speaks in strange slang and wears what seems to be a space helmet.
- Indexia is essentially a female version of Glossaryck.
- Hanna is a cyclops, but otherwise completely identical to Janna.
- Jackie's equivalent is a boxy Fem Bot that speaks in Machine Monotone.
- Eagle and Spider's equivalents are a fish and crab respectively.
- Wide-Eyed Idealist: Dennis admits that he tries to look for the best in everyone and never imagined that he would have been conned out of everything by Evil J.
- You Dirty Rat!: Evil J. LandBaron III is this, in both appearance and personality.
