* BadassDecay: In ''Ancient History'', Ghost Tucker isn't as powerful as Tucker was when he had ghost powers. Justified as Danny believes that when he separated the ghost from Tucker and broke Desiree's spell, it DePowered Ghost Tucker.
* BrokenBase: Despite the series' popularity, many fans are divided on the concept of Sam having ghost powers.
* CharacterRerailment: ''A Family Thing'' undoes Vlad's MotiveDecay from the third season when he tries to brainwash Danny into his son.
** Much to the joy of many fans, Tucker has returned to his pre-{{Flanderized}} state and is gaining true CharacterDevelopment.
* GrowingTheBeard: Following ''A Family Thing'', the series seems to be coming into its own. Even WordOfGod has said that it was the story where the series would start really forming.
* HilariousInHindsight: To those who have read "A Family Thing" and seen the ''WesternAnimation/TUFFPuppy'' episode "Sweet Revenge", you may notice that one of Butch Hartman's writers thinks a lot like the author or one of his assistants.
* RescuedFromTheScrappyHeap: Even the fans of Danielle should be happy that she's getting a lot of CharacterDevelopment in this series.
* {{Squick}}: In-Universe example. Tucker and Valerie were visibly creeped out seeing Danny and Sam making out while Sam was dressed as Danny. Of course, many viewers have this same reaction upon seeing the [[http://tuxedaaron.deviantart.com/art/There-s-ALL-Kinds-of-Creepy-334979090 pic]] the author drew depicting the scene.