SMG4: The Demon Among Us is the twenty-second episode of Season 10 and the five hundred and seventy-sixth overall to be uploaded by SMG4.
This episode was aired on June 13th, 2020.
Shroomy don't look too good...
The episode begins with Shroomy chasing a butterfly outside of Peach's Castle. Bob Bobowski goes outside and tells Shroomy that he's got a surprise for him. Saying that he loves surprises, Shroomy follows Bob, only to have a demon mask jumpscare him. As Bob taunts Shroomy for falling for the jumpscare, Shroomy's anti self takes control of his body and chokes Bob, which he tosses him aside. Grabbing a shotgun, Anti-Shroomy yells, "TIME TO HUNT SOME DEMONS!" before running out of the castle. Bob then annoyingly exclaims that some people can't take jokes these days.
Anti-Shroomy heads over to Aubergine to cause massive rampage, destroying an ice cream parlor, with Fishy and JubJub Boopkins inside. Seeing Bowser having fun with his son, Anti-Shroomy instincts kicked in, believing him to be the queen of all demons and tried to hunt Bowser down, who crashed into the brothers Mario and Luigi at an Italian restaurant, having escaped from the ice cream parlor before its destruction. Seeing the chaos of Anti-Shroomy, the brothers decided to take a taxi to the Bowser Protection Services building in the outskirts.
They arrived at the building, in which they, along with Tari and Saiko as volunteers, had Bowser in a safe "Protecc Room". Anti-Shroomy then arrived for Bowser, and quickly subdued, defeated, and captured everyone, including their strongest one Saiko, who kicked her so hard.
Everyone, including Bob, the originator of his hand-made chaos, were locked up in a cage near a historical medieval village somewhere in Rockford, witnessing Anti-Shroomy about to execute Bowser by burning him at stake. Pouring oil all over him, Anti-Shroomy was just about to set Bowser on fire until he was intervened by Normal Shroomy. Without hesitation, Shroomy, still in his body, punched his anti self, and started fighting it, while accidentally setting Bowser on fire.
Knowing that Shroomy would not be able to defeat his anti self, Mario and his friends tried to remind him of all the memories that they had together with Shroomy (although Mario's memories of him seemed to be bad). The help worked for Shroomy, as he managed to punch and defeat Anti-Shroomy, sending him flying into the space, returning to his normal self once he landed on the ground. Everybody else was released from the cage, and went home together, but not before a glimpse of Anti-Shroomy had caught the wonder of Shroomy, but it turns out that he forgot Bowser, who was already burned to a skeleton, ending the episode.
- Shroomy (both regular and his Demon Hunter personality)
- Blue Toad
- Ice Cream Server
- Freddy Fazbear
- Donkey Kong
- Luigi Doll
- SpongeBob SquarePants (as Steve Harvey)
- Heavy Weapons Guy
- Blue Toad got crushed by the door that Anti-Shroomy knocked it.
- Ice cream server got killed by Anti-Shroomy's rocket launcher.
- Shroomy and Mario got killed in the explosion after Mario used an oil truck to make a campfire. /
- Shroomy got killed by Steve Harvey's chainsaw after Mario pranks him with fake peanut can. / /
- Shrek got hit by Saiko's hammer.
- Shroomy accidentally burns Bowser into a skeleton.
- SMG4: War On Beeg SMG4 and SMG4: Mario VS Siren Head: Shroomy's anti self is shown again for the third time, but this time becoming the main focus.
- SMG4: Bowser Loses Custody Of His Children: Bowser is once again being a better father to Bowser Jr.
- This is the first video since SMG4: Wario Tries To Stop Himself From Dying in which Meggy is not present, and the first since SMG4: 🌽🌽🌽🌽𝓒𝓸𝓻𝓷🌽🌽🌽🌽 in which SMG4 is not present.
- This is Bowser's first appearance since SMG4: Mario The Supreme Leader, and his first major role since SMG4: Meggy Moves In.
- This is the first episode in the series to be written by three people, including Kevin Lerdwichagul, Jasmine Yang, and new writer Jasper Marlow.
- This is the seventh SMG4 video to place a greater emphasis on horror rather than comedy, the first six being SM64 Bloopers: Can the Villager come out to play?, SMG4: Doki Doki Mario Club, SMG4: Mario And The T-Pose Virus, SMG4: Mario SAW, SMG4: The Mario Purge (Halloween 2018), SMG4: Mario vs IT 🤡 and SMG4: The Weegee Uprising.
- The title of the name could be as a parody of The Wolf Among Us, though it's probably just a coincidence.
- When Anti-Shroomy says "Oh we got a spicy one!", the sub-captions are missing an 'a' between got and spicy.
- Doom and Doom: Eternal: After Bob scares Shroomy, visions can be seen. This caused Shroomy to turn into Anti-Shroomy and wreaks all havoc, thanks to Bob for scaring him.
- Fat Albert and the Cosby Kids: Anti-Shroomy says Fat Albert's catchphrase "Hey, hey, hey!" when Anti-Shroomy tries to destroys Lil Demon's Ice Cream Store with rocket launcher.
- The Shining: When Anti-Shroomy tries to enter the building, his quote is a reference to the film's antagonist Jack Torrance.
- The same thing happens in SMG4: Meggy's Part-Time Job, but it omits the quote.
- The Omen: This blooper is a reference to this 1976 horror film distributed by 20th Century Fox.