Dark And Interesting 'Scooby-Doo' Fan Theories About Scoob Himself

From Redditor u/quackdamnyou:

Velma can be explained. See she worked as an intern at a lab that was working on developing a secret weapon: super intelligent canine warriors. She experienced an attack of conscience and escaped with one of the subjects, who requires daily doses of the active agent in order to retain his functions. Velma took to baking the drug into small cookies. Shaggy, not really understanding, tried one of these in a bout of munchies and now he too is dependent on the agent. A side effect of this alteration is that they have developed an incredibly high metabolism and insatiable appetite.

From TVTropes.com:

Every so often, Fred or Velma will ask Scooby to act as a sort of bloodhound and get him to pick up the scent of the petty felon in the mask messing with them; the problem is that they tend to be hazy on the fact that Scooby can't turn his sense of smell on or off like a machine. Like any other of his senses, it's on twenty-four/seven; that means that the costumes can't and don't keep him from knowing who the crook in the suit is. To him, it's just another suit of clothing that the person happens to be wearing; since people know that he can speak English, he thinks that his ability to identify the malefactor du jour is a source of danger to the teenagers that happen to be in his vicinity. He only feigns a belief in monsters so that the gang doesn't realize this and put themselves in harm's way trying to protect him.

From Redditor u/IronedSandwich:

Quick note: depressants aren't drugs which give you a negative outlook on life necessarily, more drugs which calm you down.

So, in Scooby-Doo, Scooby and Shaggy love to eat Scooby Snacks. They make sacrifices for it (mostly facing their fears) and have huge amounts of energy building up to it. They also sometimes need more than one each. Also, the police haven't cracked down on it because A: Scooby-Doo is set in a financial depression and B: it's not normally for human consumption.

I'm saying they've become dependent on them to keep themselves from becoming fidgety and overly energetic (shaking!).

From Redditor u/themightyheptagon:

Scooby was bred as a super-intelligent test subject for the Soviets' space program, but escaped to America with a defecting scientist when he was a puppy. He has a speech impediment because he's smart enough to learn English, but his mouth can't form words perfectly. And the title Scooby-Doo, Where Are You! is a reference to the CIA searching for him.

Read the full theory here.

From Redditor u/Hurricane2410:

Their adventures take place in the Ghostbusters universe, after the events of the 2 movies. The reason that helping solve ‘ghost problems’ is a viable business is because the GBs established public knowledge of the threat. A bunch of small-time criminals are now taking advantage of this by faking ghosts to scam property.

Velma, Fred and Daphne are ghosts. Those 3 died back in the 1960's, which is whey they still have the dress/mannerisms of that period. Shaggy and Scooby are alive. They are just high all the time and don't know the difference between ghosts and hallucinations. They don't realize that their friends are ghosts. This is exactly why the 3 ghosts chose targeted them as business partners. They need a living person to interface for the business. They appeared to Shaggy during an acid trip.

A team comprised of ghosts and humans working together to hunt ghosts is not much different than Slimer working with the team of GBs. The goal of Fred, Velma and Daphne is to hunt down all these alleged ghost sightings in the hope that one of them is actually a ghost. They want to make new friends, recruit new ghosts. But of course, every episode turns out to be a dud so they gotta head to a new town to try again.

From a former Redditor:

It makes sense. Scooby Snacks are obviously a genetic mutation device, or possibly a type of steriod, that allows the user to break the laws of physics, and their off spring. Let me show you.

Scooby-Doo is able to talk. A dog, is able to fucking TALK! And its not like Scooby-Doo is the only one: Scrappy-Doo, Scooby-Dum, and other members of the Doo family talk as well! They also do completely ridiculous stunts, and do random retarded things. Although the rest of the Doo family is never, in my memory, seen actually consuming the snacks, the genetic mutations could be passed down from generation to generation, and consuming the snacks just furthers the effects.

And, it makes sense how Shaggy is also able to pull of ridiculous stunts, like eating an entire cafeteria of food, and immediately being fat as hell, then just shrinking. He is the only human in the shows and movies that EATS Scooby Snacks!

The ‘snacks’ were obviously made by some mad man for the purpose of conquering the world. Training an army of large dogs, able to have supernatural powers, and just rule the world. Obviously though, he failed, and The Doo family is a great failure. It also makes sense why everyone who eats the snacks seems very stupid: Shaggy seems to not have a very high IQ; Scrappy tries to beat up every one around him, even though they are much bigger; Scooby is a stupid chicken of a dog; Scooby Dum, is well, Retarded; and the few other family members ever seen don't have much brains in them. The snack obviously somehow melts lowers their brain power while giving them the powers.