Princess Quasar Caterpillar and the Magic Bell/Ghost of Butterfly Castle.Princess Quasar Caterpillar and the Magic Bell: After being sent back to the void by his new nemesis, Princess Quasar Caterpillar, Ludo realizes he has fallen into his old ways again. Dennis, Bird, and Spider try to help him, but this involves reuniting him with his former henchmen and rebuilding his old castle. When Ludo hears Star's Wand is now in Eclipsa's possession, he finally snaps as he begins scheming on stealing it and openly tells Dennis he hates the castle. As a distraught Dennis turns to leave, he is confronted by the castle's landowner, who reveals he tricked him into rebuilding it for him. Realizing how much his brother has done for him, Ludo steals the deed to the castle and continues the reconstruction with Dennis and their other siblings, allowing him to finally abandon his villainous ways.
Ghost of Butterfly Castle: Moon and River's home in the woods has grown into a small community, but the inhabitants constantly turn to Moon to solve their issues. Unable to keep up with everything, Moon goes to get her old ledger at Butterfly Castle, which is said to be haunted. Upon retrieving her ledger, Moon finds that what has been haunting the castle all along was actually Mina Loveberry. Mina reveals she has been trying to dethrone Eclipsa and was the one who put Yada Yada Berries in her food (in "Yada Yada Berries"). Moon tries to convince her that she does not have to fight monsters anymore, but in Mina's eyes she will always be a soldier and Moon will always be a queen. To prove her wrong, Moon decides not to be everyone's problem solver anymore and lets Mina do as she pleases.