SMG4: If Mario Was Spiderman is the forty-sixth episode of Season 11 and the six-hundred-and-sixty-sixth overall to be uploaded by SMG4.
It is an episode related to the Revelations Arc and multiple Spider-Men from across the multiverse, along with Spider-Man's adversaries, all make guest appearances. It was aired on December 11, 2021.
Mario becomes Spiderman and unleashes havoc on the Mushroom Kingdom
At Omnia Academy, Meggy is in her fitness support club. Mario suddenly bursts in looking for pizza, which is on the other side of the room. Meggy states that the box club ordered pizza, though only for the delivery boxes. All of a sudden, Spider-Man (aka Peter Parker of the SMG4 Universe) shows up and takes the pizza to deliver to homeless people, thanking Mario for the donation before heading off. An infuriated Mario decides the best way to deal with Spider-Man is to become one himself. After stealing Ness' spider from the insects club, he dunks it in radioactive sludge from the radioactive club to eat it.
Mario then deals with the side effects of radiation poisoning and spider eating in general and faints. Mario wakes up in the infirmary where Meggy and Melony are checking in on him when he discovers that the spider worked and now he has powers when accidentally web slinging by yawning. Mario then goes after Spider-Man while he's sharing pizza with poor people and accidentally kills him by falling on him. Mario apologizes and just before Spider-Man dies, he gives Mario his blessing to act as "Spider-Mario" before dying. Mario then goes on a rampage, giving people pizzas, even if they don't need pizza and terrorizing others, with one noticeable example being flinging Luigi into the air while he's is meditating, causing Luigi to crash on an electric fence and get zapped.
Returning home, Mario decides to help himself to some pizza. As soon as he's about to do so, Luigi shows up as the Green Goober, blaming Mario for his transformation. As Mario laughs at Luigi's new supervillain name, Luigi reveals his inter-dimensional super powers by summoning the Sinister Six, comprised of the Green Goblin, Dr. Octopus, Venom, Rhino, Sandman, Kingpin, and Vulture. Luigi tries to make the Sinister Six attack Mario, but they turn immediately and attack Luigi instead, deciding to steal the world's pizza. Mario then battles the Sinister Six, and while he defeats Sandman, the others easily overpower the spider-Italian and head off to cause mayhem.
Luigi, realizes what he's done, summons some other Spider-Men from the Spider-Verse to act as backup. They agree to help Mario and Luigi defeat the villains and together, the Spider-Men easily defeat the members of the Sinister Six. Ock then flees with Luigi and boxes of pizza, with Mario giving chase after him. Ock forces Mario choose between Luigi and pizza. At first, Mario chose the pizza, but being that family is more important, saved Luigi instead and then webs Ock off the building. A sad Mario heads back home due to the fact that he and his brother can't enjoy any pizza, but Luigi uses his powers to open a portal to hell so they can enjoy John's Pizza as some text says that Mario and Luigi lost their powers after eating too much pizza.
- Dr. Octopus
- Meggy Spletzer
- Pyro Spider-Man
- Spider-Man (Miles Morales)
- Spider-Man (Earth-X)
- Black Tarantula
- Spider-Man Noir
- Peni Parker
- Spinneret (Mary Jane Watson)
- Spider-Woman (Jessica Drew)
- Spider-Man 2099 (Miguel O' Hara)
- Green Goblin
- Joseph Joestar
- Box Club Leader
- Heavy Weapons Guy
- Monty Mole
- K.K. Slider
- Pink Guy
- Cube the Penguin
- Big Smoke
- Luigi Dolls
- Despacito Spider
- Papa John
- SMG4: Mario Goes To College: A continuation of the events of this episode.
- SMG4: War On Smash Bros Ultimate: Once again, Mario laughs the exact same way he did in this blooper when Luigi (after becoming electrocuted) introduces himself as the Green Goober. However, unlike in the past, the Hotel Mario music isn't playing in the background as usual.
- Shrek dies of radiation.
- Spider got eaten by Mario.
- Spider-Man got body slammed by Mario by accident.
- Sandman's sand body ends up blown to pieces by Mario.
- Cube got accidentally died in car explosion by Mario.
- Frankie got ran over by a truck.
- Green Goblin was crushed by Earth-X Spider-Man.
- Venom got Xenomorphed by Spoderman.
- Miles and Spinneret died of exposure to bug spray from Rhino.
- Rhino was crushed by Despacito Spider that was summoned by Peni.
- Kingpin was launched at mach speed into Electro and the Vulture.
- Electro and the Vulture was rammed by Kingpin who was yeeted by Spider-Men.
- Ock was knocked off a ledge by Spider-Mario.
- SMG4 accidentally leaked the video on Twitter and Instagram a day before the video was released. Yet the video was still private.
- The previously planned title for the blooper was "If Mario was in... Spiderverse".
- Luigi's alter-ego of Mr. L from SM64 Bloopers: Luigi Labyrinth makes his return to the series after over 6 years. However, he is named the Green Goober unlike before.
- In addition, he now has a new GMOD model to fit the modern SMG4 style, since his N64 look in his debut was just an edited form of Luigi.
- Despite what the synopsis says, Mario isn't the one wreaking havoc amongst the kingdom.
- Luigi's line of "Green Goober Mega Form X Ultra Plus Super Duper Delta Special Chrono Secret--" is taken from Uberduck.ai, which is just like his brother Mario.
- This Uberduck.ai voice for Luigi was previously used in Mario Reacts To Nintendo Memes 2.
- Due to SP//dr's GMOD model not being on the Steam Workshop, it is reduced to a limbless Robloxian with a red bottom and spider-legs, aka Despacito Spider.
- This blooper marks the returns of:
- Spider-Man, Ness and Smoke since SMG4: If Mario Was In.... SQUID GAME, as well as marking Spider-Man's first main role in a episode.
- Spider since SMG4: Meggy's Part-Time Job, over a year since.
- Jay since SMG4: War On Beeg SMG4, also over a year since.
- Waluigi since SMG4: THE 5,000,000 SUB SPECIAL.
- Frankie since SMG4: War Of The Fat Italians 2021, almost 3 months since.
- The Luigi Dolls and John since SMG4: If Mario Was In... Poppy Playtime.
- John's presence in this blooper references this being the 666th video released on SMG4, as 666 is related to the Devil.
- John is the devil in this series, so his presence makes sense.
- Despite Saiko's absence in this blooper, one of her voice clips is used by Spider Okino.
- Saiko would eventually return to the series in SMG4 Christmas Special 2021.
- The entire episode is a reference to the various films based on the Marvel superhero Spider-Man and related characters. This episode also promotes the then-upcoming release of Spider-Man: No Way Home (as well as the announcement of Spider-Man: Across the Spider-Verse (Part One), the upcoming "Two-Part" sequel to Into the Spider-Verse.). Luigi even nicknames himself as the Green Goober, which is an obvious parody of the Green Goblin, who, himself, additionally appears in this blooper.
- Spider-Man: Into the Spider-Verse: This episode is specifically based on this film. A similar plot happens when Miles Morales (Shameik Moore) takes on his new job as the new Spider-Man after the real Spider-Man is killed is similar to how Mario takes it upon himself to become the new Spider-Man after he kills the real one on accident.
- SpongeBob SquarePants: When Ock says "Hey, Peter!" Mario does the infamous "No, this is Patrick." meme from Season 2's Big Pink Loser.