Accidental Pervert: When SMG3 and Bowser team up to kidnap the Princess, Bowser knocks out a security guard using a rock and they both walk into the room, only to find Peach taking a shower. Lucky the curtain was closed, though.
Acid Reflux Nightmare: "Ssenmodnar 5", when SMG4 tells Mario he fell asleep watching the video starring Toad and him.
In "A Trip to Teletubbie Land", Mario has a nasty accident while fixing the castle pipes and ends up in a land full of Teletubbies. At the end, it was revealed to be dream, but the pipes weren't fixed yet.
all lowercase letters: All text is written like this in the 2011, 2012 and 2013 bloopers, except when a character is voicing strong emotion. This is less invoked in SMG4's recent bloopers.
Ambidextrous Sprite: A man is seen holding a "!raeN si dnE ehT" at one point. He actually says it like so as well, and X dismisses him: "I don't want your Japanese crap."
Every Mook in Operation G.A.Y was a sprite of Luigi, some of them wearing a Princess Peach dress.
Art Shift: Done deliberately whenever a character is doing something not possible in Super Mario 64, where Garry's Mod ragdolls are used instead.
Possibly the biggest examples are in "Retard Karts 101", where because of the lack of Garry's Mod models done in SM64 style, Luigi shifts from being a recolor of Mario to a black-eyed plush which resembles Luigi's colors in the Mario canon more closely. This is only excluded during closeups of Luigi's front side, where he returns to SM64 Luigi.
Peach, Wario, and Waluigi after he goes buff swap to Garry's Mod ragdolls (which look like their modern counterparts) when driving their karts, while Wario returns to a Mario Party model in front-angle closeups.
Asian Speekee Engrish: the Japanese islander later revealed to be SMG3's henchman when SMG4 meets him a second time in "Super Happy Magical Fun Fun Island".
Ass Shove: Cooking with Bowser & Mario 2 has Bowser escaping from an old man that attacked Mario earlier, which leads to the man ramming himself into Bowser's butt repeatedly. Mario's answer? Taking out a tank and blasting a bomb towards Bowser's butt, hoping to take out the old man in the process. The bomb does not detonate, and it is shown still stuck in Bowser's ass.
A giant Mario sieges the castle in "Scatman's Revenge".
Mario himself becomes this in "Free Lunch for Mario" after eating a Mega Mushroom.
And again in "A SM64 Fairytale" to fight Bowser, who has also become giant.
Attempted Rape: A large Boo in "Luigi's Retarted Mansion" upon it's first glimpse of Luigi's butt (which he called "ass"). Thankfully Luigi is pulled out of the room by the person who kidnapped Mario before the Boo reaches him.
Big Damn Heroes: The policeman in "Birthday Freakout" who arrested Enzo, followed in the next episode (Luigi's Retarded Mansion) with Dr. Robotnik saving Luigi from a possessed, flying chair.
Attempted twice in "The Visitor", with another policeman trying to arrest Enzo before being shot while shouting his Catch Phrase. Then, SMG3 appears and tries to slam into Enzo with a Koopa Clown Car, but he misses.
In "Mushroom Wars", to save R2-D2 from a flock of Teletubbies, Mario winds up almost attacked by them until SMG4note named "Hobo-Wan-Konobo" in this special barges into action and saves Mario.
Big Eater: Mario has been shown to scarf down 35 bowls of spaghetti in exactly five seconds.
Big "NO!": SMG4 when he's about to be squished by Gourmet Guy in "Mini Italians".
SMG4: Mario! Have you eaten any spaghetti? Mario: What's spaghetti? SMG4: (in Darth Vader's voice) NOOOOOOO- Mario: Shut up! I'm trying to read!
Again, this time by Mario, in "Bob-ombache":
Dr. Mario: I'm so sorry...I'm afraid you're pregnant... Mario: NOOOOOOOOOOOOOOO-
And again by Mario in "Boil the Big Bully":
Mario:(sees a Bully knock over his fridge, causing his spaghetti to come out) NOOOOOOO-
Luigi again (twice) in "The Visitor":
Dr. Mario:(checks a collapsed Toad by repeatedly crouching and standing on him, then jumps and sniffs)He's dead. Luigi: OH, NOOOOOOOOOOOOOOOOOOO! NOOOOOOOOOOOOOOOOOOO! SMG4: Shouldn't we...uhh...call the police? Mario: Meh, it's just Toad. SMG4: Okay, I guess that makes sense.
Blatant Lies: Mario claims to have never used Scatman John's music in his life.
Body Horror: While certainly not Squick levels and just Played for Laughs, Toad's "dance" has his head detaching and rotating 90 degrees clockwise reattaching on it's side, and his limbs merging into his body.
Later on in Mario for Hire, Mario gets a rather very brutal and rather grotesque off-screen beating by the cashier that Mario attempts to convince to let him buy a kart for free as a promise. He returns to Peach's Castle with a very bloody and distorted face, resulting in Mario letting out a Precision F-Strike followed by an Oh, Crap reaction from Peach.
Brown Note: Mario is forcefully clad in rainbow clothes in "Scatman's Revenge" that cause weird things to happen to anyone who sees him.
Butt Monkey: Of all the characters in the series, Toad gets hit the worst, especially in episodes that only feature Luigi the residential Chew Toy as an one-off background character.
Call Back: Remember that guy wearing monochrome clothes in Mario Goes Shopping that tried to tell a baby not to play in the streets before getting run over by Mario? He comes back in Mario for Hire to do the same thing to another baby, and like before he's run over by Mario.
Some objects from past 2014/late 2013 bloopers reappear in the intro of "Ssenmodnar 7".
Can't You Read the Sign?: Long story short, in Mario for Hire on his quest to buy a new kart, Mario humps the inside of a kart, much to the salesman's annoyance at his direct defiance of a sign banning the EXACT SAME THING that Mario is doing.
Chekhov's Gun: After Mario and SMG4 defeat Weegee in "War of the fat italians 2014", they find a "Weegee Board" in the aftermath. Not knowing what to do with it, the board is placed into the castle basement, and in the next episode to follow, Mario finds the Weegee board covered in cobwebs, and when he brings it upstairs to show SMG4, he summons Weegee into the castle. Fortunately he's friendly to everyone in the castle, except Mario.
The Chew Toy: Luigi and Toad, though Luigi is usually the one being most mistreated by the cast.
Christmas Episode: Supermarioglitchy4 made two of these: one for 2011, and one for 2012. The one made for 2013 is a song.
Continuity Nod: The van Mario uses to deliver spaghetti in "Mario's Spageti Delivary" makes a brief cameo in the mall scene of "Mario for Hire", where it's shown alongside the kart that's on sale. The modified Pink Cabriolet driven by the Tubby Custard Salesman from that episode is also present.
Courtroom Episode: "Spaghetti Law", wherein Mario and SMG4 end up getting spaghetti banned in the Mushroom Kingdom thanks to some guy owning a house. They get it reversed in the end, but also end up with 20 years of community service because they were caught by the police.
Didn't Think This Through: After being told by SMG3 he wasn't evil, Eggman uses a missile that brings a giant alien monster into the city, which then proceeds to destroy everything.
The Ditz: Mario and Bowser frequently fall into this.
Don't Do Drugs: The message is repeatedly used in the bloopers, such as in "Super Happy Magical Fun Fun Island", "Ssenmodnar 2", and "Yoshrooms".
Downer Ending: Mario for Hire: Mario finally gets the money he needs to buy himself a new kart, and while talking a victory lap around the track, he bumps into residential Butt Monkey Luigi who is casually standing in the middle of the track, launching him towards the Heavy's machine gun, prompting him to appear and scare Luigi. At first Mario doesn't care, until Luigi calls for Mario's attention, which causes the Heavy to shift his attention to Mario (who previously put the blame on Luigi for stealing the Heavy's sandwich). Mario attempts to threaten the Heavy with a badass fighting posture and appearance, but is immediately defeated and launched across the landscape, with the brand new kart Mario bought following in suit. The kart lands on Mario, bounces off, and self-destructs.
Driven to Madness: Enzo, the Original Character featured in "Birthday Freakout", is driven to killing Mario after he destroys Peach's Castle, where he was having his birthday party. Thankfully the police are able to arrest him at his house after he corners Mario with a small bomb, but Enzo still swears that one day he will successfully kill Mario, once and for all.
Driven to Suicide: Mario after spaghetti gets outlawed in "Spaghetti Law". At first he does indeed die, before respawning in 3 seconds.
Mario does mention wanting to kill himself after he is made into a Minecraft character.
Early Installment Weirdness: Many of the earlier episodes can fall into this, preferably those that show the HUD on the top of the screen or don't use Garry's Mod.
Enfant Terrible: Baby Mario (or Pepsi as Mario calls him) in "The Babysitters".
His monster form made a reappearance in "The Monster".
Enraged By Idiocy: SMG3 demonstrates this when he chastises Bowser for not knowing what shampoo is.
Epic Fail: When SMG3 calls for the escape submarine in "Super Happy Magical Fun Fun Island", a truck drops instead.
In "Mario's Spageti Delivary", Mario winds up chasing a red Teletubby selling Tubby Custard on foot, only for it to escape in it's car. As it begins to fly away, it suddenly crashes into the boundaries of the map, falls back down to the ground, and blows up.
Flashback Cut: Done with the numerous times Mario invokes Scatman John's music in "scatman's Revenge".
Flat "Wah.": In "Ssenmodnar 7" during a skit involving Wario and Waluigi repeatedly saying "WAH!", Luigi joins in with a small "Wah."
The Fourth Wall Will Not Protect You: After examining his cursedclothes' effects on the characters, but not before making King Bob-omb explode, Mario asks the viewers if they still love him... and then the video drops in quality and gets static playing over it because of his cursed clothes. Oddly, Mario is aware of this.
"oh great now I'm all grainy"
"Freaky Friday" Flip: Done between Mario and SMG4 in "The Swap" with some magic spells from a wizard... and the latter is applying for a job. Hilarity Ensues, unsurprisingly, until SMG4 is fired thanks to the wizard who swapped them.
This isn't the first time this happened in the series though. "Switcheroooveralls" had a similar plot, but instead involving more characters than just two.
Done again with Mario and Steve in "Mineswap", where Mario becomes a Minecraft character and Steve (aside form getting lighter skin) a Super Mario 64 character. Steve seems quite sexily happy with the swap, while Mario gets very frustrated, such as not being able to turn the knobs on doors with his blocky hands and destroying toilets and plates/bowls of spaghetti. He and SMG4 fail to get it reversed in the end.
Bully Boss: The only way I can let you live is if you can transform into a Pepsi machine... Mario: Hmm... (Cut to a room in Peach's Castle, with Mario as a Pepsi machine. Mario barfs out soda and a moment after closes his mouth. He then burps.) Mario as a Pepsi Machine: Hey! That was pretty good!
Give Me Back My Wallet: Mario when Yoshi steals his wallet in "Wallets and Dinosaurs" which breaks into an all-out brawling war, just to get back the wallet.
Great Escape: "Crime Time" and "Party Rock Prisoners" has the characters(s) trying to break out of jail. The former blooper has Mario helping Luigi escape from jail. The latter blooper has Mario and Toad trying to escape from jail together.
Greedy: Mario when he won a million coins in "Rich Glitch".
This also applies to Toad in "Toad Gold".
Groin Attack: In "Mushroom Wars", Peach performs one onto the Trooper that is trying to flirt with her.
"SMG3's Plan to Destroy SMG4 Cause He Felt Like It".
"The Lie That Was A Cake That Is A Lie" could also count.
Also "Super Happy Magical Fun Fun Island".
Loud of War: Scatman John's ghost and Mario do this in "Scatman's Revenge".
Love Potion: Mario and Luigi used this on Peach and Daisy in "Awkward Weddings" to get them to like them. But it backfires on SMG4 and X.
And again in "Peachosal Love" thanks to gay Bob-ombs breaking apart his final attempt to get Peach to like him, but with SMG4 involved as his partner who helped him try to get Peach to like him (before Mario got the potion) instead of Luigi and/or Daisy. However, it turns Peach into a monster instead.
The Mafia: The Mushroom Mafia & the Fire Flower Mafia. Mario is forced to work for the former in one blooper thanks to Donkey Kong, with one of his tasks being to invade the latter.
Magical Land: Apparently the land in "The Land That Never Was", because there is no exit... until Mario found one.
It even makes a return in "Hide and Seek", but with SMG4 and X instead of Mario. One of the parts of the land made a cameo in this blooper because SMG4 fell into another part of the land.
Minus World: "The Glitch" causes the castle to become this, but with flying characters and objects.
Mushroom Samba: Mario does this in "99.5% Crazy" after eating a strange mushroom.
Repeated in "Mushroom Wars", which results in Mario stripping and breakdancing. Thankfully SMG4 breaks him out of it rather quickly, using Justin Bieber's song Baby.
"Yoshrooms" features Yoshi who endlessly demands Mario's supply of spaghetti after eating one bowl himself. To shut him up, Mario feeds him a Poison Mushroom which kicks Yoshi into a Samba. Luigi manages to even trick Mario to take a bite out of one himself. One week later, Mario eventually snaps out on his own, but Yoshi remains drunk for over two weeks.
Multi-Part Episode: "The Lost Gems", "The Adventures of Mario & Luigi", and "A SM64 Fairytale", with the former being split into three parts and the latter two being split into four parts.
"Mushroom Wars," a parody of Star Wars is also split up into multiple parts.
My Eyes Are Up Here: As R2-D2 is projecting a holographic speech of Princess Peach to Mario in "Mushroom Wars", Mario is distracted by her breasts.
No Fourth Wall: A lot. This is especially evident in "Breaking Walls".
Offscreen Moment of Awesome: In "SM64: Mario in real life!? (200 vid special)", when real-life SMG4 leads almost all of his characters into his room, he hits Mario with a flat object (possibly a mirror). We never get to see the impact as it just cuts to when SMG4 drags Mario out, post-impact.
Mario almost got this at one point in part 1 of "A SM64 Fairytale" after accidentally killing the princess with a fridge (and causing hilarity to ensue). He does get beheaded in the finale of the Fairytale episodes trying to defeat a giant Bowser.
SMG4 loses his head to a intoxicated Mario (who later becomes giant) in "Free Lunch for Mario".
For a short time in "Mushroom Wars"' first part, L-3Ginote Luigi as C-3PO loses his head in the jet crash next to Mario's farm, like his other counterpart, Luigi. He retrieves it eventually.
"A Trip to Teletubby Land": The pipes weren't fixed yet.
"A Lost Luigi": A bunch of characters from Luigi's dream appear at his and Mario's house and beat him up. Also, Luigi is still hatless.
Palette Swap: Almost every Original Character is a recolor of Mario. Even his own brother Luigi suffers the same fate, despite there existing customized and playable Luigi models in select Super Mario 64ROM hacks.
Eventually this would be lampshaded in "The Mario Parable" with the narrator pointing out how everyone looks exactly like Mario.
There are also a couple of Peach recolors present, mostly to colorize her like Daisy. However they are not as common, nor were they brought up in the above-mentioned lampshading.
Averted with Wario and Waluigi; previously they played this trope straight, but starting from "The Wacky Wario Bros", they use green-screened models from Mario Party 3.
Paper-Thin Disguise: Mario and Bowser wear Toad hats in "A Fungus Among us" to get into Peach's castle after it's raided by Toads. At first it works, even after the cap falls off Mario in his initial visit of the invaded castle. Only after it falls of a second time does the disguise fail.
Pass the Popcorn: As the Wizard Duel between SMG4 and SMG3 in Spells n' Wiztards kicks off, Mario is snacking on some popcorn with Bowser sitting alongside him. He asks Mario to pass the popcorn, but Mario declines.
Police Are Useless: Played with in "The Visitor". When the Serial Killer(Enzo) does The Reveal, he guns down a cop that barged in to arrest him, and he even successfully tricks two cops watching ontop of Peach's Castle by putting a piece of paper over a pair of binoculars that reads "everything is fine. :D" in crude writing.
President Evil: Toad when he becomes president for a day in "President Toad Washington".
"The Visitor" has such a case: it references Five Nights at Freddy's when Lakitu is looking through the security cameras, The Simpsons and its Movie when Bowser repeatedly says he's invisible and when Luigi uses his Poltergust (respectively), and Super Mario World when SMG3 is riding in a Koopa Clown Car.
One example is in the first few moments of "Guards n' Retards: Swag Party Hostages", when Chris finds Sergeant Mark:
Chris: Oh God. If his ugly yellow ass is not in here... Sergeant Mark: What was that about my ugly yellow ass? The camera zooms out a bit to reveal the Butt Ninja, coming back from the first installment.
Enzo is plotting revenge to kill Mario once and for all, following the events of "Birthday Freakout". His revenge is handed out in a skit involving him, Mario, and Toad Birds during "Ssenmodnar 7", and much later on in "The Visitor"
Rich Bitch: The guy who bought the last spaghetti before Mario in "0% of Spaghetti".
Roger Rabbit Effect: The video "SM64: Mario in real life!? (200 vid special)". Every major and recurring character in the series ends up in IRL SMG4's house.
Rube Goldberg Device: ''Cooking with Bowser & Mario 2" features one, all just to get a Yoshi egg from a pack of Yoshis sitting at a table for use in an omelet.
Screams Like a Little Girl: SMG4 in "Who let the Chomp out?", when the Chain Chomp approaches him and Mario, does this before throwing a Star at the Chomp, which turns it into Pac-Man.
Earlier in ''Cooking with Bowser & Mario 2", Bowser screams like this when Mario finds the Old Man in the parking lot.
Screwball Serum: The cursed clothes Mario unwittingly wears in "Scatman's Revenge" end up causing strange things to happen to anyone and anything who/that see(s) them, including Bowser bouncing, the trees disappearing, the screen dropping in quality...and King Bob-omb exploding.
Self-Destruct Mechanism: SMG3's hidden base on the "Super Happy Magical Fun Fun Island" has one. Everyone survives thanks to SMG3's mecha being explosion-proof.
Serial Killer: The shadowy figure in "The Visitor", who kills people and shoves their corpses into toilets. He later shows himself to be Enzo, who broke out of prison just so he could finally have the birthday party of his dreams.
Shirtless Scene: Waluigi in "Retard Karts 101". He stays like that for the rest of the blooper.
Trademark Favorite Food: Mario loves spaghetti (or as the series spells it, "sphagetti"). His extreme love for it is often shown in situations that Mario does not want to be part of... and then whoever wants him to come with them (SMG4 in most cases) tells them that spaghetti is in danger and Mario automatically joins along.
Trapped in TV Land: Mario once had to fix the pipes in Peach's Castle and ended up having a bad accident that lead him to a land full of Teletubbies. Turns out at the end that it was All Just a Dream.
Trenchcoat Storefront: Although having no trenchcoat, this trope was parodied by a Bandit in "Desert Head" after a cactus leaves Mario for mistaking it as Peach.
Triangle Shades: Bowser puts on a pair and breakdances after he successfully cooks some Italian Ravioli using only Doritos in Cooking with Bowser & Mario 2!.
Unexplained Recovery: If someone loses their head or legs, expect them to be completely restored in the following scene.
Unfinished Business: The ghost of Scatman John enacts his revenge on Mario in "Scatman's Revenge".
Unstoppable Rage: In "Freddy's spaghettiria", Chica causes Mario to enter one after he exclaims that spaghetti "tastes like shit", resulting in Mario hunting down the four Five Nights at Freddy's animatronics for the rest of the night.
Wizard Duel: There is one crammed into the end of Spells n' Wiztards.
Zombie Apocalypse: When Mario ended up travelling 10,000 years into the future in an attempt to jump through the Castle in "Castle Jumping = Time Travelling = Zombies", his future self used his time machine to get the present Mario back to his own time, but an accident started by Mario and his horn causes future!Mario to accidentally set the setting on the machine to "random". They hope to be home, but instead end up in the year 2075, the year of the zombie apocalypse. With the help of X (who was a new character at the time of the video's release), the zombies were countered.
The Halloween episodes of 2011 and 2013 have two of these.