Notice how each Arc has it's own major villain. Whether they only appear for that arc to cause most of the mayhem or they keep coming back, these guys are sure to give our heroes Hell in a hand-basket.
Necrosan
An undead dragon that tried to cause a bit of mischief against the Review Team, but now he holds a boiling hot grudge against them.
- Adaptation Personality Change: Not that he had a personality to begin with in his original incarnation.
- Affably Evil: He may look terrifying but all he really wants is to spread mischief and the sort. He retains some of this in battle as well.
- Faux Affably Evil: He's slowly descending into this, though. Come his very own arc...
- Aggressive Categorism: He doesn't care who he's fighting for the most part. Especially during his first appearance.
- Allergic to Routine: Aside from petty reasons, this is why he chose to fight the Review Team.
- Ascended Extra: Originally starting out as a characters in the never made Primal Rage sequel, he now has a part in our universe as a creature that hunts down runaway souls.
- Ax-Crazy: Has shades of this.
- Then, he just kept going.
- Back from the Dead: As of the aptly named 'Revival of N', he's back. The thing is, he's trapped in an alternate Los Angeles.
- Bad Boss: Titan certainly didn't have a wonderful time with this guy. The dragon even tried to kill Rep-Stallion in a fit of anger.
- Bad Powers, Bad People: He wields necromancy and he uses it for malicious purposes when he fights the Review Team.
- Bald of Evil: To be expected, having no hair.
- Berserk Button: He REALLY doesn't like losing to mere mortals.
- Beware My Stinger Tail: If his tail tip is anything to go by.
- Big Bad: Of his own arc. Specifically, 'Necrosan-The Final Challenge'.
- Bond Villain Stupidity: He ALWAYS takes the time to gloat about his upcoming victory...only to have it dashed seconds later.
- Averted in his third appearance. He's planning something...
- Breath Weapon: Green fire
- Complexity Addiction: He suffers from this greatly. Only four members, some backup behind him, just watch and see. He does intervene during the second battle, though.
- Dem Bones: Lessened from his original appearance, but the bones are still there.
- The Determinator: NOTHING will stop him from attaining victory. Even if he keeps losing all the time.
- Dreadful Musician: Could not carry a tune if his life depended on it.
- Even Evil Has Standards: He may seem like he was going to destroy London just to get his revenge, but the city was revealed to be a fake.
- Doesn't excuse what he does later...
- Evil Laugh: His cackle is this.
- Evil Sounds Raspy: To be expected, seeing how he's voiced by 2013 Spinal.
- Evil Versus Evil: Two of the members he fought were Megatron and Mr. Freeze.
- Fangs Are Evil: If his teeth are anything to go by.
- For the Evulz: He challenged 4 of the Review Team members to a fight to the death because he wanted to have some fun. This didn't turn out well for him.
- As Sin, this is magnified by 1000.
- Fatal Flaw: His pride and arrogance do him in considerably.
- Hell Is That Noise: His roar is described as a combination of a crow and a dubstep DJ mixed together.
- His Own Worst Enemy: His gloating has lead to this.
- Kill the Ones You Love: Plans to do this for each member of the Review Team once he has his revenge.
- Killed Off for Real: As of 'Necrosan-The Final Challenge' by Titan of all people.
- Psyche! Didn't stick.
- Laughing Mad: Does this at times, especially after his third defeat.
- Leitmotif: Spinal's Theme from Killer Instinct 2013.
- Meaningful Name: Read a book. Seriously, it's right there!
- Narcissist: He can't stand the thought of one beating him in battle.
- Names to Run Away from Really Fast: His name, in Demon language, means "Death Master".
- He doesn't seem to like that meaning, though, when he thinks about it.
- Near-Villain Victory: He was this close to ending Z-Squared's life before getting stabbed.
- Night of the Living Mooks: His undead space gangster army is this.
- O.O.C. Is Serious Business: His third appearance has him take his defeat in stride...and laugh at an upcoming event...
- Psychopathic Man Child: Occasionally, he'll act like a spoiled brat.
- Pride: His main trait and worst enemy. He simply will not rest until it's restored.
- Red Eyes, Take Warning
- Reptiles Are Abhorrent: Just look at him!
- The Resenter: Of the entire Review Team.
- And later, anyone who had anything to do with them.
- Revenge: He desires this after being defeated by Z-Squared.
- Later, he states that he'll kill anyone who has ever liked the Review Team when he's done with them.
- Revenge Before Reason
- Sadist: Some of his pranks are...questionable. He also enjoys seeing humans panic.
- Becomes this fully in his own arc.
- Shout-Out: He's a skeletal maniac. His theme is that of a skeletal maniac. Makes sense.
- Smug Super
- Tail Slap: Does this often.
- This Cannot Be!: He screeches a variation of this after being defeated.
- This Is Unforgivable!: How he perceives losing to mortals.
- Underestimating Badassery: One of his defining traits.
- Villainous Breakdown: He starts to lose his composure upon thinking of losing to mortals. He then loses it after Z-Squared sends him back to Death.
- To be fair, he does this everytime when he's defeated.
- At least, until his third appearance...
- His biggest one occurs as Sin.
- Villainous BSoD: When he finds himself trapped in the alternate Los Angeles, he accepts an offer to go to Grillbys due to sheer frustration.
- Would Hurt a Child: Just ask Finn.
- And the minions for that matter.
Sin
By the power of the Necrononimicon, Necrosan absorbed the souls of all in the Nightosphere. With this power, he became the almighty Sin. A vicious and terrible creature, he went on a massive killing spree before being confronted by the team. Alas, not even they could defeat him. However, he made the mistake of killing Tafeli in front of Z-Squared. Thus, Shadow-Squared arose, beat Sin to such a pulp that the Holo-World exploded, and (in a fitting twist of irony) was finally put to rest by Titan's pinkie.
- A God Am I: He claims to be this once he transforms.
- Beware My Stinger Tail
- Breath Weapon: He can breathe a stream of green fire.
- Card-Carrying Villain: He revels in the destruction he causes.
- Chest Blaster: The gem on his chest serves as this.
- Cold-Blooded Torture: Subjects Z-Squared to this.
- Cruel and Unusual Death: Aside from the usual soul sucking, he's willing to go the extra mile.
- Curb-Stomp Battle: Once he gets himself together, he shows the Team what for.
- Later, though, Shadow-Squared puts him in his place.
- Deadly Disc: One of his attacks is forming these one each shoulder. He fires them at rapid pace.
- The Dreaded: Plans on becoming this when he transforms.
- Eaten Alive: The King of Ooo and Princess Bubblegum died by his teeth.
- Swallowed Whole: Canyon got it even worse...
- Eldritch Abomination
- Evil Is Petty: All this for him being spited in Necrosan's first appearance!!!
- Faux Affably Evil: Ben Stiller's voice cements this.
- For the Evulz: He kills off the Candy Kingdom not for practical reasons, but all for a test run at best!
- Horns of Villainy
- Jerkass: Albiet a powerful jerkass that can back up his claims of power.
- Knight of Cerebus
- Leitmotif: Let the Madness Begin by Fozzy.
- More Teeth than the Osmond Family: Looking at him up front...GUH.
- Omnicidal Maniac: He kills everything in his path just to take their souls.
- Our Dragons Are Different: He generally looks like a winged serpent if anything.
- Politically Incorrect Villain: He claims women can't drive.
- Monster Misogyny: Crosses over with this. Consider his favorite way of offing them...
- Rage Quit: Decided to destroy his own Holo-World when it looked like he was losing to Shadow-Squared.
- Red Eyes, Take Warning
- Sadist: Where do we even start?!
- Smug Super: He's not afraid to flout his power.
- Soul Jar: The gem on his chest functions like this. The souls are basically fuel for him!
- Soul Power
- Spikes of Villainy: His shoulder spikes can even create razor discs!
- Super Mode: Of Necrosan.
- Villainous Breakdown: Has a minor one when being beaten by the Review Team.
- Has an even larger one when being beaten by Shadow-Squared. When he's killed by Titan, he completely snaps.
- With Great Power Comes Great Insanity: Necrosan was unhinged before, but this takes his madness up a whole new level.
- You Have Failed Me / You Have Outlived Your Usefulness: He takes this trope to the max with Titan and his minions.
- Your Soul Is Mine!: His main trait. The way he absorbs souls is not just by killing the host, but also sucking it up ala 'Reaper of Souls'.
Golus
A mysterious titan that lays waste to New York and the Review Team. Taken down by Starscream, Meta-Ridley, Twilight Sparkle, and Squidward. However, he's revealed to be a bit more than a living hunk of city.
- Affably Evil: He loves to play. Just ask Fluttershy.
- Almighty Idiot: He's just a big child with too much power.
- Always Accurate Attack: His eye beams can only be dodged if you hide behind something. But even that is hard.
- Attack of the 50-Foot Whatever: A Golem made of New York City powered by magical energy. Geez.
- Being Evil Sucks: He'd much rather play with toys made of rubble.
- Companion Cube: His toy spaceship he makes of rubble.
- Chekhov's Gun: It plays a part in his final form.
- Curb-Stomp Battle: The Review Team at least lasts longer than they did with Satan with this guy...
- Even worse when he achieves his final form.
- Eldritch Abomination: His final form gives off this vibe.
- Elemental Armor: The near entirety of it is covered in city. From street signs to entire chunks of concrete!
- Energy Ball: 3 purple orbs are sent from it to keep its force field up. They are also capable of forming constructs. Heck, the very thing that keeps Golus together in a huge orb in his center.
- Evil Versus Evil: Remember what we said in the Satan section.
- However, he's revealed to be not so bad.
- Eye Beams: No matter what you do, unless you have expert timing, they will find you and fry you.
- Eye Scream: His headlights blow out when he dies. Except he doesn't that time.
- Friendly Enemy: Becomes this to Fluttershy and Marceline.
- Giant Equals Invincible: The sheer size of the thing makes it a difficult adversary to topple.
- Half the Man He Used to Be: Sometimes, Golus has to disconect his lower half from his upper in order to get an advantage. A good example it the final battle.
- Homing Projectile: His Eye Beams
- Improvised Golems: Duh!
- Kaiju: The size of one.
- Killed Off for Real: Destroyed by Starscream, Squidward, Twilight Sparkle, Gwonam, and Meta Ridley. However, thanks to Sir, he achieves his final form where he has to be taken down by the Brigade AND Squidward's transformed state.
- Laser Blade: Ehhh...let's call it that. See below.
- Leitmotif: The Opened Way from Shadow of the Colossus.
- Made of Explodium: When it's core is destroyed, he blows up like a fireworks display before crumbling. He survives, though.
- Non-Malicious Monster: Revealed to be this.
- One-Winged Angel: Becomes a spider-like black/purple monstrosity when his toy spaceship is destroyed.
- Perpetual-Motion Monster
- Psychopathic Manchild: Though he's an innocent child at heart, he STILL is here to cause havoc. Taken up to eleven when he gains his final form.
- Shock and Awe: His shrapnel sword attatchment can generate volts of energy. It takes up a lot, though.
- Shout-Out: The design is a clear homage to Legendary: The Box.
- Oh, and those eye beams...
- Taken for Granite: In his final form, he can emit a beam that does this to his foes.
- Unstoppable Rage: Oh, Sir, you just HAD to break his favorite toy...
Colonel Kernal
A deformed and downright psychotic Super-Soldier, this man desired revenge upon the world for being laid off due to his methods. Thanks to the teaching of a stranger, he figured out how to make himself a base and even a Metal Gear RAY. Things got better for him when he found bits of Golus energy that he used to capture the Sea Monsters, so they would help him in the conquest of Earth. However, he was foiled by Z-Squared, Godzilla 2000, Tafeli, Mr. Freeze, Flapjack and pals, the Sea Monsters and even his own mechanical servant. Not even being empowered by the energy could save him from being killed.
- Agony Beam: His electric powers double as this.
- An Arm and a Leg: His arms are chopped off by Metal Gear RAY. In his Super Form, no less.
- Asskicking Leads to Leadership: Not only does he believe this, but he can sure do this.
- Back from the Dead: In his super form no less! He still loses to Papyrus, though. He's also killed by Necrosan in said fanfic.
- Bad Boss: Metal Gear RAY was practically asking for redemption because of how he treated him.
- The Beastmaster: What he wants to be in regards to the Sea Monsters.
- Big Bad: Of '20,000 Leagues Under Sanity'.
- Captain Patriotic: What he sees himself as, but...
- Eagleland: Yeah. That's about right.
- Cold-Blooded Torture: He does this in hopes of making more Super Soldiers.
- Defiant to the End / Villainous Valor: Even after getting his arms cut off, he refuses to accept defeat.
- Dies Wide Open: Sorta. Whenever he gets knocked out, his mouth is wide open. Always.
- When he actually dies, though...
- Drill Sergeant Nasty: AND HOW.
- Dystopia Justifies the Means: Plans to turn the world into a patriotic wasteland where he rules as king.
- Evil Cannot Comprehend Good: He doesn't see the right in the more good things that Metal Gear RAY does.
- Evil Genius: With some help, he built himself a base, among other things.
- Eye Beams: Gets these in his Super Form.
- General Failure: For all his bluster, he's this. He's a brute in combat (making us question his combat training) and he thinks the worst of toxins make the best of soldiers. Is it no wonder that so many test subjects die?
- Half the Man He Used to Be: His final fate. His halves even explode!
- Dramatic Irony: He did this to Metal Gear RAY. However, guess who gives him the very same punishment?
- Human Popsicle: Thanks to Mr. Freeze. Doesn't last long.
- Leitmotif: His regular one.
- Make My Monster Grow: When he is empowered by the Golus energy.
- Monochromatic Eyes
- Morally Ambiguous Doctorate: He partakes in experiments on his own prisoners to make them become Super-Soldiers. Fails in horrific fashion, but he doesn't care.
- More Teeth than the Osmond Family
- Muscles Are Meaningful: Yeah, he's strong, but he can tire himself out easily.
- Our Giants Are Bigger: When given a power boost, he has the ability of electricity.
- Perpetual Frowner: Scowling is his thing. We mean this.
- Restraining Bolt: He uses these to keep Metal Gear RAY and the monsters in line. Namely, it blares a terrible rendition of 'Under the Sea'.
- Shock and Awe: His super form is capable of this.
- Sparing the Aces: Planned on doing this, but things changed.
- Super Mode: After being given the energy he's been using this whole time, he turns gigantic. He even gains a few new powers.
- Take That!: His look, the way he fights, his very voice, and especially the way people react to him...yep. Rob Liefeld isn't exactly well liked in Zibulewsky's book.
- Victory by Endurance: How the Team beat him the first time.
- Villainous Breakdown: Right when he's getting sliced in half. "NO! STOP! I COMMANDED YOU! MY AMERICA! MY BEAUTIFUL AME-"
- With Great Power Comes Great Insanity: Turning him into a Super-Soldier made his utterly repugnant behavior even worse.
- The energy finished the job.
- Would Hurt a Child: Just ask Flapjack.