History Tearjerker / ScoobyDooMysteryIncorporated

'''Fred:''' [[YoureNotMyFather You used me!]] Where'd you hide it, in your pocket? ''[Fred discovers Jones's pocket is empty]''\\

* Mr. E's flashback to him and Pericles meeting when he was a kid in "The Gathering Gloom". Especially his line before it: "Were we ever once so young?" Made worse when they reunite as friends at the end of the episode...while plotting Cassidy's ''murder''. How they have changed.

'''Fred:''' But work's that way! ...Why do I even bother?\\

* In a meta-tearjerker, hearing Creator/CaseyKasem as Shaggy's father one final time in the series finale with the knowledge that the episode will be his final involvement in the ''Scooby-Doo'' franchise ever since the franchise started nearly 45 years ago. Kasem passed away about a year and a half after the finale aired, but his final words in the franchise are his [[PassingTheTorch character telling Shaggy how proud he is.]]

** The photo spread of the Darrows as yet another historical team of mystery-solvers includes one of Danny holding a cat. Presumably it was a talking cat, same as the other teams have all had talking animals. Yet there's no sign of this cat in any of the flashbacks to the mansion's sinking, implying that the cat died before the quake, ''caused'' the quake, was away from home and was left alone to grieve for its family, and/or has completely been forgotten by Danny.
* Meta: The passing of the show's art direct Derrick J Wyatt on December 16th, 2021.

* Meta: The passing of the show's art direct Derrick J Wyatt on December 16th, 2021 hits the fanbase as hard as the Transformers and Ben 10 fandoms.

** The photo spread of the Darrows as yet another historical team of mystery-solvers includes one of Danny holding a cat. Presumably it was a talking cat, same as the other teams have all had talking animals. Yet there's no sign of this cat in any of the flashbacks to the mansion's sinking, implying that the cat died before the quake, ''caused'' the quake, was away from home and was left alone to grieve for its family, and/or has completely been forgotten by Danny.

* In "Nightmare in Red" we learn the spirits of El Aguirre and his men don't want the Nibiru entity to be destroyed which would lead to them being freed because they believe they don't deserve salvation after the things they did. Aguirre makes vivid, horrified recollections of the carnage and he and his men inflicted, while the background music shifts to the sounds of swords clashing and people screaming. This really drives in what a heartless, vindictive monster the creature inside the sarcophagus must be if it is capable of corrupting so many individuals to that extent. Aguirre and his men have spent centuries in limbo believing themselves to be complete monsters because of what the entity did to them.

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[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/php0mxwtppm.jpg]]
[[caption-width-right:350:[[HeroicSacrifice "Just keep going, Scoob."]]]]

** According to WordOfGod, Mayor Jones wasn't lying when he said loved Fred.

* The Horrible Herd. There's a scene that seems to be a direct shout out to the most traumatizing moment in ''Disney/TheLionKing''. Except Mufasa's been replaced by Nova. Scooby is understandably devastated. She's found alive, and the Gang rush her to the hospital, but considering how badly she's injured, one wonders if Friar Seras was talking about Scooby when he said "the dog dies"...