Abnormal Limb Rotation Range: Happens with just about every character at some point, intentionally or not thanks to always being dragged around by their heads.
Affably Evil: In Metal Sonic's gang, the only one to show any true desire to kill the lead cast is Metal Sonic himself, which makes sense once it's revealed that Metal Sonic is really Silver back for revenge yet again. Pikachu brushes off Metal's instructions and doesn't even try to kill Knuckles when the two meet face to face (instead opting for a rap contest), Mega Man and Bowser (despite the later saying "Yeah that sounds fun" when they split up) are more interested in the food available in the mall, and the Dolphin prefers to just pose erotically in front of everyone in the video store. If anything it's the heroes that are more hostile to Metal Sonic's gang instead of the reverse, since they successfully knock out and tie up all of Metal Sonic's crew just is time for them to battle Metal Sonic and square off against the newly-transformed Monster of the Week.
Artifact Title: By the individual video. While all of them actually do include zombies, in many cases the zombies take a back-seat to the Monster of the Week. This was inverted in Doom Ship, which starts out having nothing to do with zombies, but then they get on the ship.
Batman Gambit: Silver's ultimate goal in Vengeance revolves around this.
Berserk Button: Don't ever say you used Tails' tacos to summon a giant monster.
Or say you're hungry for one yourself. Amy, Charmy, and Mega Man found this out the hard way.
Bi the Way: Knuckles is usually straight in the series, but that changes in Doom Ship The Movie when he notices Espio's horn, which leads into a romance, though it ends in tragedy.
Camera Abuse: In Gmod, the camera works very much like a tripod. Cue the numerous moments when someone decides to touch it and the camera topples over, sometimes sending it into a spinning frenzy or launching it across the room.
Characterization Marches On: Sonic changes his "gimmick." In the second and third videos publish-wise, his shtick is that he speaks in monotone, acts like a Cloud Cuckoolander, and is a walking advertisement for things like Pizza Hut. Then Origins adds atittude and gives him his "douchebag" part, something that has stuck with him since.
Chekhov's Gun: Doom Ship has a few: The anchor Eggman drops down (serves as how the zombies get there), Vector's diarrhea-inducing Sweedish meatballs (later used on the Monster of the Week), and the dolphin that makes an occasional appearance (gives Knuckles a ride to the crew).
Disney Villain Death: Both Shadow and Eggman die in Thing this way. The former returns in Diaries and the later in Vengeance.
Doomed by Canon: Subverted. Cream and Knuckles are absent in Apocalypse 3, suggesting that they will die in Origins. And while Cream dies, she's eventually brought back into the cast by virtue of the clones from the space ship, while Knuckles is revealed to have not died, but turned into a vampire, which he lost anyway when Silver took his powers.
The narrator's voice is lower and less enthusiastic.
The effects are much worse. The streams used to make their heads move are actually visible this time.
The ending is far more closed in than following videos, and a bit of a downer at that. Shadow is bitten by zombies, they break in and take down Amy, Rouge, and Tails, and Sonic runs into a base just to get bit by a zombie Shadow. There is no Sequel Hook like the following videos, probably because they weren't originally planned.
The video is far shorter than the rest. This barely totals over four minutes. Everything after has no less than thirteen.
Amy and Rouge only show the slightest hint at the personalities they will later get, and Tail's doesn't at all. (He doesn't even speak.) Sonic's character seems to be a blend of his pre-Origins and Origins-onwards selves. Shadow is the only one that remains the same throughout the whole series.
The zombies actually are the main and only conflict force this time.
Enemy Mine: To save his own life, Eggman is forced into joining the heroes during the zombie attack in Doom Ship.
Excuse Plot: There's often very little justification behind any given plot, as it's obviously done for the fun factor of the videos. Space takes the cake, with the characters getting their space ship just because Rouge asked the maker for one.
Exactly What It Says on the Tin: Guess where Space, Doom Ship, and Shopping Mall take place. And yes, every installment in the series has zombies, although they are rarely the central opposing force.
Gainax Ending: Origins, Vengeance, and In Space ends with gags about the narrator being cut off by his relatives, then has sounds of what's going on outside. Doom Ship is even odder, with a pop-up window taking over the entire screen. Shopping Mall seems to finally end this.
Sonic: Douching through the snow, driving my Hummer, which I don't really need, cause I'm only a single guy!
Knuckles' songs in Doom Ship and Shopping Mall.
Hypocritical Humor: Shopping Mall gives us an exchange where Sonic tries to get it on with Rouge after the rest of the team sets off to stop the Five-Bad Band, where he's pushed away and lands on the ground. He then exclaims "I feel bad when I do that to Amy", followed by Amy randomly showing up to cuddle with Sonic, where Sonic throws her aside as well.
Sonic now being a classically American selfish, egotistical jerk who owns a gas-guzzling Hummer, smokes even though he has passengers in the car and works at both Pizza Hut and Starbucks.
The easiest and probably most offensive is Tails' Mexican heritage, his love for tacos which goes to the point of familial love and his psychopathic rage towards anyone trying to steal one.
Vector being Swedish, eating horrible meatballs that induce diarrhea and being captain of a ship named "SS Ikea".
Shopping Mall lampshades this (even moreso than the series's norm) with the introduction of Pikachu, who is another "black" character. Knuckles doesn't like this, and insists that he should be the only black stereotype in Sonic Zombie.
Nice Job Breaking It, Hero: In yet another attempt to "do'' Sonic, Amy instead decides to have sex with one of the many Sonic clones on Blaze's starship, accidentally releasing everyone else's clones, including Dr. Eggman's.
Shopping Mall has the doors that get sealed off by the heroes in the beginning to block out the zombies getting destroyed by The RivalBadass Biker gang when they barge into the mall the same reason Sonic and his friends took shelter there.
Nice Job Fixing It, Villain: Sort of. If Satan didn't go and announce he used the power of Tails' tacos, he wouldn't be beaten to death by a young mexican fox who suddenly went insane.
Perpetual Poverty: In effect starting from Vengeance; the team repeatedly mentions not eating for days, but no one has shown signs of starving or being physically weaker from the lack of food. For instance, even on an empty stomach, Knuckles is still able to defeat a gang of zombies without receiving any type of body damage or bites.
Potty Emergency: Sonic and Shadow in Doom Ship once the Swedish meatballs Vector fed them earlier kick in. They find Rouge waiting outside while Amy uses the restroom, and Tails "walks" in later needing to go too.
Power Incontinence: Sort of. Sonic's "Hornhog" form in Vengeance causes him to become hostile and having a thing for raping his victims to death. He can still speak and even questions what happened to him, though the main characters remain scared to approach Sonic in Hornhog form.
Sealed Evil in a Can: Thanks to the logic that any of Blaze's clones that has a living counterpart on Earth that dies in some way inherits the memories of their deceased counterpart, the clone of Dr. Eggman accidentally released by Amy is just as dangerous as the real one Sonic killed an episode prior.
Sequel Escalation: It isn't clear if this is intentional or not, but each video (going by when they came out) was longer than the last until Shopping Mall. Probably not, since Diaries 3 is only two seconds longer than Thing 2.
Serial Rapist: Hornhog Sonic. The only one that sees this as a good thing is Amy, since she is constantly trying to get near Sonic.
Spoiler Opening: The preview images for both Origins and Vengeance reveal several key plot elements. Origins' reveals that Knuckles will become zombified and Sonic will have to power up using Rouge's boobs, Vengeance spoils Sonic becoming a "Hornhog" and the return of both Knuckles and Silver after they were killed off in prior episodes.
Doom Ship The Movie spoils that Eggman will join the heroes, Knuckles and Espio will romance, a sea monster will attack the ship and Tails will pull a lifeboat out of Rouge's ass to escape.
Sonic even lampshades the spoiler-tier thumbnails in both Origins and Vengeance.
Stopped Numbering Sequels: Vengeance onwards (Origins could be excuse by being a prequel) just sticks with a title vaguely related to the video in question, especially the location it's centered on. Considering the first video is numbered 3, this might have been a good thing, avoiding Mind Screws.
Swallowed Whole: In Vengeance, Monster Silver kills Shadow this way, however Silver is later impaled on some poles, meaning Shadow could still be alive and escaped from Silver's dead body offscreen.
The next episode Space confirms that Shadow did indeed die inside Silver's body, since according to Blaze, Shadow's life readings have dropped to zero, resulting in the team picking up a clone of Shadow during their visit on Blaze's Starship.
Doom Ship shows Sonic and Tails being swallowed by the giant sea monster that attacks Vector's ship, leading to the two depositing two of Vector's laxative "meatballs" in the stomach, causing the monster back to suddenly erupt with feces, expelling Sonic and Tails in the process.
Take That: In the first episode released, Sonic's voice was meant to be a Take That towards the then-current voice actor for Sonic, Jason Griffith. It later changed to a Roger Craig SmithTake That after Sega switched official voice actors.
Doom Ship shows Tails' hatred towards Taco Bell.
Tails: Oh this would've never happened if we just had tacos!
Sonic: Heh. What are you f***ing kidding me? Have you ever had Taco Bell before?
Tails: Taco Bell does not serve tacos, they serve... dog food!
Take That, Audience!: Near the end of Vengeance, Sonic makes a quick stab at viewers who take the series seriously and don't see it as a Stylistic Suck series. Another such stunt would appear in Space.
The entire main cast sans Knuckles in Doom Ship all rush and argue over the restroom on Vector's ship after experiencing harsh diarrhea from the odd-looking meatballs they ate earlier. Things don't get much better when Tails catches Charmy about to munch one of his tacos.
The Monster of the Week gets this too when Sonic inserts spare "meatballs" into it's stomach, which causes the sea monster to experience a rather harsh case of diarrhea.
Shopping Mall has Sonic walking in on Metal Sonic taking a wizz and realizing that robots cannot do that, as well as Eggman having to rush off to the bathroom near the end.
Too Dumb to Live: Knuckles, at least in his first appearance in Origins. When he finds Espio with a zombie bite on his shoulder in Doom Ship, he recognizes it, compared to when Cream had a bite and bit Knuckles in Origins.