Scooby-Doo 50th Anniversary Giant #1 is a one-shot with a cover date of November, 2019. It was published on September 13, 2019.
Synopsis for "Snack Attacked!"
Barb Spears, the CEO of Scooby Snacks Inc., shows a commercial celebrating the 50th anniversary the product to Mystery, Inc. with the launch of new Scooby Snacks made with 24 karat gold. They wanted Scooby to shoot a commercial but shows them that their plans were interrupted by a mummy who stole the "mother dough", which is necessary in making the snacks. This, she states, will cause them to cease production in a few days. Barb states that she suspects Ruby Foods' CEO Hannah Noshington who wants their company to be financially collapse. Fred and Velma decide to question her while telling the others to check if the other ingredients are safe and sound.
Scooby and Shaggy get tired after trying nearly all the ingredients and get told there's only one more room left. Barb also tells them that she might have to sell the factory to Casey Takamoto, who for years had been eyeing it. Daphne notices a monster behind them, causing them to run away and bump into Fred. Velma informs them that someone had barged into an ingredient room, with Barb telling them that they stole the gold flakes they needed to make the special Scooby Snacks for the 50th anniversary. Both Barb and Fred agree that Hanna couldn't have been behind it. As Barb states in despondence she'll have to sell the place, Daphne alerts them to a trail of gold dust that goes toward the packaging room.
Daphne and Velma go to question Casey while leaving the others to investigate. As the team and Barb walk towards the mystery room, they run away after seeing a fake ghost which is told by its cohort to hurry before they find another way. Barb leads the team to the packaging room through a shortcut but finds it trashed. The senior art director Don Welker tells them that their prototype box for the golden Scooby Snacks was stolen. Velma informs them that Casey couldn't be possibly behind it and Daphne thinks up an idea to catch the perpetrator by making another prototype.
After planting the prototype which they pretend is the real one, they catch a man while trying to steal it. Scooby discovers that it's Shaggy while Barb was disguised as him, getting told that it was a fake mystery orchestrated by the whole team to get his picture on the package after the shipment of the prototype box was delayed, but wanted it to be a surprise. All of them then wish him a happy birthday.
Appearing in "Snack Attacked!"
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Supporting Characters:
- Barb Spears
- Don Welker
Other Characters:
- Casey Takamoto (Mentioned only)
- Hannah Noshington (Mentioned only)
Synopsis for "Now You See Them..."
The Mystery Inc. arrives at an old lighthouse after receiving a voice mail about it being menaced by a monster, but they don't find anyone inside. Fred tells the team to split up, with Scooby and Shaggy searching in one direction while Velma and Daphne accompany him. Shaggy while trying to find the kitchen stumbles upon a monster and runs away with Scooby, bumping into Daphne and Velma, with the former stating that Fred is missing.
As Daphne asks Shaggy to describe the monster they encountered, they find it standing right behind him and run away. Daphne states that Velma too has been separated from them while they fled, but reasons that she might just be hiding and many of the monsters they faced before were criminals using a disguise. Shaggy states that he and Scooby don't want to face such people, including real estate developers, smugglers and weird lighthouse keepers. This causes a man claiming to be the lighthouse keeper to come out and rebuke his remarks.
The lighthouse keeper demands to know what the kids are doing there and Velma asks if he sent them the message about the monster at the lighthouse, to which he responds no, but states that strange things have been happening there recently. After he leaves the room, Daphne goes missing and Shaggy states that they must find their teammates so they can leave the place quickly. A real estate developer then appears before them and advices that they sell the lighthouse to her. Scooby however finds that even Shaggy has gone missing after she leaves.
A smuggler soon appears and tells Scooby to leave the lighthouse and he guesses that he kidnapped his teammates, based on the smell of Shaggy's sandwich on him. After running away from the smuggler, he finds a door with a note instructing opening it to resolve the mystery. Scooby does so and finds all the mysyerious people and the monster he met gathered in one room. They wish him a happy birthday and reveal themselves to be their teammates, stating they decided to don disguises for the surprise birthday party.
Appearing in "Now You See Them..."
Featured Characters:
- Scooby-Doo (Flashback and main story)
Supporting Characters:
- Mystery Inc. (Flashback and main story)
Other Characters:
- Mr. Carswell (Flashback only)
- Captain Cutler (Flashback only)
- Cosgood Creeps (Flashback only)
Synopsis for "Scooby's Last Rep"
The gang is excercising at Silver's Gym except Scooby-Doo and Shaggy, who are busy in making smoothies with protein powder. As Fred tries lifting a barbell, something he has been preparing to do for a long time, a ghostly giant grabs it out of his hands and warns him not to come back to the gym again. All of the gymn equipment starts malfunctioning and people run away from the gym.
Later back at the gym, Mr. Silver tells Mystery Inc. that the giant has been driving away his customers for a long time and he might have to shut it down permanently ahead of the traditional annual strength atheltics competition that has launched careers of people in various fields. The gang decides that they must save the gym and convince Mr. Silver to let them run it till the day of the competition. Over the next few days, Mystery Inc. drives up the business of the gym through various means, including by reinventing Scooby-Doo as the champion strongman Scoob Doobeyev.
Scooby is able to perform great feats of strength due to his voracious appetite and intake of protein powder. The giant however fails to show up by the day of the competition and the gang is forced to go ahead with it. As Fred gets ready to lift the barbell again, he finds himself confronted by the giant. Scooby however slams into it after smelling protein powder on it and the gang corners it. As Scooby licks its mask off, they find that it's the gym receptionist Pectora Major.
Pectora states that she's been trying to win the contest for years, but had it when she was forced to help in making protein powder smoothie for Scooby-Doo and being covered up in it often. Shaggy realizes that this is why Scooby was able to smell the powder on her and Pectora blames the Mystery Inc. for spoiling her plans.
Appearing in "Scooby's Last Rep"
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Supporting Characters:
- Mr. Silver
Villains:
- Pectora Major
Other Characters:
- Electra Lyte
- Glutavius Maximus
- Ryu Pumped
Locations:
- Alps (Mentioned only)
- Japan (Mentioned only)
- Latvia (Mentioned only)
- Peru (Mentioned only)
- Machu Picchu (Mentioned only)
- Silver's Gym
Synopsis for "Tiki Taboo Trouble"
This story is reprinted from Scooby-Doo, Where Are You? #48.
Appearing in "Tiki Taboo Trouble"
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Synopsis for "A Wolf in Creep's Clothing"
This story is reprinted from Scooby-Doo #92.
Appearing in "A Wolf in Creep's Clothing"
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Synopsis for "Out of Line"
This story is reprinted from Scooby-Doo, Where Are You? #51.
Appearing in "Out of Line"
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Synopsis for "Over the Boardwalk"
This story is reprinted from Scooby-Doo #155.
Appearing in "Over the Boardwalk"
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Synopsis for "I Want My Mummy!"
This story is reprinted from Scooby-Doo #154.
Appearing in "I Want My Mummy!"
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Synopsis for "Ghost Writers"
This story is reprinted from Scooby-Doo, Where Are You? #76.
Appearing in "Ghost Writers"
Featured Characters:
- Mystery Inc.
- Scooby-Doo
- Shaggy Rogers
- Fred Jones
- Daphne Blake
- Velma Dinkley
Supporting Characters:
- Paige Turner (Single appearance)
Villains:
- Ghost of Edgar Allan Poe (Mr. Libris) (Single appearance)
- Ghost of William Shakespeare (Z) (Single appearance)
Other Characters:
Locations:
- Public library
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