A world famous scientist specialising in gamma radiation, mutated into a super-strong hulking creature as a result of exposure to his own prototype gamma radiation bomb.
- Adaptational Intelligence: Hulk's intellect is upgraded considerably for the show. While the comics version is often brutish but no fool, this version is not only a good leader, he knows his way around technology (without smashing it, much).
- Deadpan Snarker
- Fusion Dance: With Red Hulk. Of the Mix-and-Match Critter kind.
- Genius Bruiser
- Gentle Giant
- Going Commando: As revealed when his iconic pants briefly get caught on a statue's spear.
- Heroic Spirit
- Jerk with a Heart of Gold
- Only Sane Man: He's the most calm (!) and level-headed member of the team.
- Red Oni, Blue Oni: The blue to Red Hulk's red.
- Secret Identity Identity: Does Hulk consider himself Bruce Banner? The show keeps it a bit vague. While She-Hulk, Red Hulk and A-Bomb are often called by their real names, Hulk is near exclusively called "Hulk" or a nickname (Big Guy, Greenie, ect.), the number of times he's been called Bruce can be counted on one hand. However, oddly enough, his spacewalk suit is labeled "Banner" and not "Hulk".
- Secret Keeper: He and A-Bomb are the only ones who know of Skaar being The Mole.
- Team Dad
The boy who inadvertently caused Bruce Banner to become the original Hulk. Later mutated into a gamma mutate himself.
- Ascended Fanboy: He was Hulk's biggest fan and closest friend before he got mutated into A-Bomb. He's ecstatic that this means he can now be Hulk's actual partner rather than just a side-kick.
- Catchphrase: "A Bombs Away!"
- Cursed with Awesome: Mostly, he emphasises the awesome part, but he becomes aware of the downsides.
- Good Counterpart: He's the same kind of gamma-mutate that the Abomination is; hence the name; "Abom".
- Kid-Appeal Character: Fits into this as the dorky, friendly, fun loving and child-like member of the team.
- The Last of These Is Not Like the Others: He's an Abomination-esque mutate rather than a Hulk.
- Genre Savvy: In "Wendigo Apocalypse"; Having watched a lot of horror movies, he predicts several things before they happen.
- Rolling Attack
- Secret Keeper: He and Hulk are the only ones who know of Skaar being The Mole.
- Supernatural Gold Eyes: Gains them after his mutation.
- Tag Along Kid / Kid Sidekick: Considered this until he becomes a gamma mutate himself.
- Visible Invisibility: Has the ability to blend in with his surroundings.
Bruce Banner's female cousin, who became a female gamma mutate after receiving a blood transfusion from him.
- Action Girl: She's Hulk's cousin and a gamma mutate. It goes with the territory.
- Brainwashed and Crazy: As Galactus's herald.
- Berserk Button: She does not take kindly to herself or the other Hulks being referred to as "monsters."
- Beauty Is Never Tarnished: Averted. She gets just as much Toilet Humor assigned to her as the male gamma mutates do.
- Burping Contest: Her bio mentions she enjoys participating in these, but it hasn't happened on the show (yet).
- Deadpan Snarker: She tends to be the most sarcastic of the Hulks.
- Hand Blast: Seems to be able to do this now (which was useful against Laufey).
- The Lad-ette: She's just as boisterous, aggressive, hot-headed and gross as her male counterparts, including indulging in Toilet Humor just as readily. As mentioned above, her bio says she enjoys partaking in Burping Contests, which is hardly a ladylike thing to do. Also partakes in Roller Derby, a sport with a strong Lad-ette subcultural aspect to it.
- Sleeves Are for Wimps: Her outfits usually expose her arms.
- The Smurfette Principle: The only female on the team.
- Super Empowering: Becomes the herald of Galactus temporarily.
- She's Got Legs: Just like her comic counterpart.
Skaar first appears to be an amnesiac, when the agents of S.M.A.S.H. meet him he's under the control of Annihilus. Hulk soon learns he's a spy for The Leader.
- Adorkable: As literally the most child-like and naive of the Hulks due to his alien origins and youth, he can be surprisingly dorky when confronted with Earth culture, which in turn makes him surprisingly admirable.
- The Atoner: Skaar wants to make up for his past actions as both The Mole for the Leader, and for not being able to protect the people of Saakar.
- Barbarian Longhair: Which helps distinguish him (alongside his more gray skin tone and Cool Sword) from the Hulk.
- Becoming the Mask
- Brainwashed and Crazy: When he first appears, he's being directly mind-controlled by Annihilus.
- Cool Sword: His Weapon of Choice.
- Lightning Bruiser: Skaar is surprisingly fast for such a big guy.
- The Mole: Skaar began as a spy for the Leader before undergoing a HeelFace Turn.
- Mysterious Past: He's working with the Leader to learn about his origins.
- Rated M for Manly: In Thor's opinion.
- Related in the Adaptation: Inverted. Comic Skaar is Hulk's son via an alien lover; Agent Skaar is not, as far as we know, biologically related to Hulk.
- Reverse Mole: Hulk's trying to make him this. Thankfully, he eventually succeeds.
Red Hulk/Thaddeus Ross
Originally a US Army General dedicated to capturing Hulk, "Thunderbolt" Ross eventually went so far as to turn himself into a gamma mutate himself.
- Adaptational Heroism: Is usually a villain in other media, or at least, starts out as such.
- Anti-Hero: His poor communication skills often affect both his image and how well he works with the rest of the team.
- Arrogant Kung-Fu Guy: Spends a lot of time mocking the other Hulks for one reason or another.
- Boisterous Bruiser: It's made very clear that he actually took Hulkification really well, as he enjoys having the Super Strength and Super Toughness to be a one-man army instead of pushing paper behind a desk like he would be doing if he was still a human general.
- Butt-Monkey: The show does focus the abuse a little more on him than on the rest of the team.
- Burning with Anger: He gets hotter the angrier he gets, though it's only been seen in gags so far.
- Character Development: It's subtle, but at the beginning of the show he had a I Work Alone mentality, wanted to be in charge instead of Hulk, and hated Devil Dinosaur. By the second season, he has actually learnt to work as a team with the others, no longer questions Hulk's authority that much and expresses anger when he sees what the Leader did to Devil.
- Fusion Dance: With Hulk
- Good Is Not Nice: Can be very rude at times, but always does the right thing when it counts.
- Guns Akimbo: He carries two huge double-barrelled weapons, and uses them both at the same time.
- Jerk with a Heart of Gold: He may be the team asshole, but he's still got a good heart deep down.
- Leader Wannabe: Often talks about taking charge of the team himself. Justified, since he was once a general, and is used to giving orders, rather then taking them.
- Papa Wolf: He's very protective of his daughter Betty, though the two have been estranged for years.
- Red Is Heroic: Given that he's the Red Hulk.
- Red Oni, Blue Oni: The red to Hulk's blue.
- Superhero Packing Heat: He's got an impressive collection of weaponry, to say the least.
- All Animals Are Dogs: He buries Red like a bone and even plays fetch.
- Dinosaur of a Different Color: Red
- Red Is Heroic
- Team Pet: After Savage Land.
- A.I. Is a Crapshoot: Invoked when it becomes sentient and turns against the Hulks after one crash too many, later averted when they talk it into a HeelFace Turn.
- Deadpan Snarker: Surprisingly enough. It constantly made snide comments towards the smashers once it became sentient.
- HeelFace Turn: The jet is given sentience do to a virus implanted by the Leader. Eventually, sympathy prompts it to stop trying to kill the Hulk's for revenge, and sacrifice itself to save the people of earth.
- Running Gag: Gets wrecked a lot.
- Shout-Out: To HAL.
- Transforming Mecha
Iron Man/Tony Stark
- Attack! Attack! Attack!: His favorite strategy? Hit everything hard.
- Powered Armor
- Red Is Heroic
- Rich in Dollars, Poor in Sense
- What the Hell, Hero?: Is called out by Hulk and his team for creating Hulkbuster Armor designed to defeat the team. Though at the end of the episode, Hulk says to keep one of the Hulkbusters, just in case he goes crazy.
- Call-Back: In one episode, he mentions his past experience as "Spider-Ham". That experience happened in one episode of his own series.
- Hero of Another Story: He called himself the Ultimate Spider-Man and while his face is censored, it's noticeably a censored version of his Ultimate Spider-Man face.
- Misblamed: In-Universe; at the end of "All About Ego", Jameson says that Ego's failed destruction of Earth was somehow Spider-Man's plan. This and the whole 'menace' thing are part why he and the Hulk get on.
- Motor Mouth
- Red Is Heroic
- You Fight Like a Cow: A staple for the character.
- Voiced by Steve Blum
- Enemy Mine: With Hulk in "Wendigo Apocalypse"
- The Cameo: In The Collector, he only shows up with no speaking role while being trapped inside of a containment prison.
- Toxic Friend Influence: Hulk mentions in Wendigo Apocalypse that he brings the worse out of him.
- A Father to His Men
- Aesop Amnesia: a played with example in that he's never seen learning the aesop in the first place. In the 'Secret Avengers' episode of Avengers, Assemble!, he specifically states to Fury that there's more to the Hulk than just smashing. By 'Planet Monster Part 1', he seems to have forgotten this.
- The Cameo: He is trapped in a containment prison with no speaking role in The Collector.
- The Cameo: She is trapped in a containment prison in The Collector.
- The Cameo: Has a small appearance being imprisoned with no speaking role in The Collector.
- The Cameo: He is one of the Avengers being imprisoned in The Collector.
- The Cameo: Like most of the imprisoned Avengers in The Collector.
- The Cameo: He made a minor cameo appearance being one of the imprisoned heroes in The Collector.
- The Mentor: Briefly becomes A-Bomb's mentor in magic.
- The Cameo: She made a cameo appearance being one of the imprisoned heroes in The Collector.
Howard the Duck
- The Cameo: He only shows up as one of the imprisoned heroes in The Collector.
Helped the Hulks defend Earth against the Ice Giants.
- Boisterous Bruiser: Loves to fight and to party.
- Captain Patriotic: Is, at first, the defender of Greece, to the point that Hulk suggests that he can't leave. As it turns out, he can, he just generally doesn't.
- Character Development: is, at first, simply interested in partying, flirting and fighting for the fun of it, but he learns when to be serious.
- Drop the Hammer: Though it's technically a mace, he uses it like a hammer.
- Expy: He's very like a pre Character Development Thor, and Hulk refers to him as the Greek Thor.
- Famed In-Story: and he knows it. Oh, he knows it.
- Glory Seeker: Is this.
- Leeroy Jenkins: Fouls up Hulk's plan by charging straight in.
- Miles Gloriosus: Subverted. He may go on and on about himself, but he can back up the boasts.
- Nice Guy: He's a long way up himself and a braggart, at least at first (and A-Bomb points out that so would most people if everyone praised them for several thousand years), but he's nice and friendly to pretty much everyone.
- Sex Is Violence: Has family friendly shades of this - he compares love and war by saying, 'does everyone not love to fight?'
- Super Strength: He's as strong as any of the Hulks. The guy isn't called 'the Prince of Power' as a pet name, folks.
- And Then What?: A forcibly calmed down Hulk does this in "The Green Room" where he asks Leader what exactly it gains him to actually get the victory over the Hulks that he wants so badly.
- Arch-Enemy: To the Hulk.
- Beard of Evil
- Big Bad: Of season 1.
- Big Bad Wannabe: In Planet Monster, he's down to this, unsuccessfully forming an alliance with the Supreme Intelligence and Ronan, only for him to get absorbed, and the fact that they consider him insignificant.
- Catchphrase: "Premise: X. Conclusion: Y."
- Diabolical Mastermind: Was behind Annihilus and had Skaar became a mole. Also the Ice Giant attack.
- Kick the Dog: His actions are often just as much about hurting the Hulks as personally as possible as they are about defeating them. Hulk actually calls him out on this in "The Green Room" where he points out that this causes Hoist by His Own Petard because every time he has them dead to rights he just can't resist twisting the knife which is what gives the Hulks a chance at defeating him.
- My Brain Is Big
- Sealed Evil in a Can: Spent most of season one locked up in the Hulks base, then at SHIELD in season two.
- Ungrateful Bastard: The Hulks have actually spared/saved his life a couple of times, but he just goes right back to trying to kill them afterwards.
- Villain Decay: He was more or less a genuine threat in earlier episodes, but starting with his capture by the Hulk, he slowly moved to Ineffectual Sympathetic Villain. For the first half of season 2, he is reduced to a prisonner inside the Hulks' ship, where he is assigned to toilet duty, amongst other things.
- Big Bad: Of the Doorway to Destruction episodes.
- Dimension Lord: The ruler of the Negative Zone.
- Flat Character : He has little characterizations beside being a Dimension Lord trying to invade Earth due to his megalomania and sadism.
- Starter Villain: By virtue of being the main threat in the first episode.
- Beard of Evil
- Glowing Eyes of Doom
- Hand Blast
- Large Ham: He's quite bombastic, to say the least.
- Throat Light
- Voice of the Legion: Speaks in a deep, reverberating voice.
- Collector of the Strange: Capturing and collecting various superheroes is quite unorthodox, to say the least.
- HeelFace Turn: Not in this series, but he'd go on to preform one in the Ultimate Spider-Man series.
- Underestimating Badassery: Sort of. He specifically excluded Hulk and Spider-Man from his collection because he was only interested in collecting heroes and didn't considered them as such, due to their Hero with Bad Publicity status. By the end of his first episode however, he aknowledges he was wrong and swears to include them the next time.
- White Hair, Black Heart
Ego the Living Planet
- Beard of Evil
- Evil Sounds Deep: He's voiced by Kevin Michael Richardson, after all.
- Subverted by his actual voice when the Hulks get inside his brain, which is high-pitched.
- Genius Loci
- HeelFace Turn: Apparently undergoes this after the Hulks save him from Galactus.
- The Man Behind the Curtain: he actually is a small, spheric creature hidden inside a giant planet he has complete control over.
- Omnicidal Maniac
- Beast Man: He's a half-man, half-pterodactyl hybrid.
- Everything's Better with Dinosaurs: It's actually worse
- Evil Sounds Deep
- Mind Manipulation
- Omnicidal Maniac: Had it not been for the Hulks, his machine would've meant the end for mankind.
- Power Copying: Steals Impossible Man's powers
- Winged Humanoid
- Summon Bigger Fish: He summons Fin Fang Foom
The Wrecking Crew
- Adaptational Modesty: Her comic self had bare thighs and a Cleavage Window. Here, those body parts are covered by white fabric.
- The Smurfette Principle: Titania is the only female in the prison breakout team with the Wrecking Crew and the Absorbing Man in "The Skaar Whisperer".
- She's Got Legs: Just like her comic counterpart, except her legs are made even sexier now that she wears white tights that show her attractive thighs/legs through the fabric.
- A God Am I: Being Galactus and all.
- Beam Spam
- Cosmic Entity
- Eye Beams
- Hand Blast
- Oh, Crap!: Gets this reaction from Hulk when he beams down in front of him.
- Physical God
- Super Empowering: Makes She-Hulk his herald in his debut.
- Big Bad Duumvirate: He is usually Leader's partner-in-crime.
- The Chessmaster: Every time the Hulks make a plan he's three steps ahead.
- Curb-Stomp Battle: He takes out Skaar before the episode starts. Then Devil Dinosaur. Then A-Bomb...Then Red Hulk.
- De-Power: Courtesy of Ghost Rider.
- Evil Counter Part: To A-Bomb. A-Bomb is even the first one to see Abomination up close.
- Evil Is Bigger: Same gamma mutate as A-Bomb. But much, MUCH bigger. Abomination even comments on it, upon seeing A-Bomb. "You are tiny and weak"
- Genius Bruiser: Unlike most portrayals, where he's just The Brute. He's very cunning in this adaption.
- Knight of Cerebus: The most serious and deadly villain, yet. He takes most of the team down without trouble. And his ultimate goal is to blow up half the continent, while blaming it on the Hulks.
- "The Reason You Suck" Speech: Gives one to Red Hulk.
- Red Eyes, Take Warning
- Super Soldier: His purpose on becoming a gamma mutate. One specifically to fight the Hulk. Thankfully, Ghost Rider cures him back to human form.
The Supreme Intelligence
- Big Bad: Of "Planet Monster", as well as the final antagonist of the series.
- Evil Overlord: Of the Kree Empire.
- Final Boss: The final threat the Agents of S.M.A.S.H. face in the series.
- Kick the Son of a Bitch: Absorbs Leader into his intelligence.
- Killed Off for Real: A-Bomb collides his ship into space, which then explodes, killing him off for good.
Ronan The Accuser
- Adaptational Villainy: Ronan lacks most of his complex Anti-Villain qualities from the comics and is portrayed as a cruel, malevolent, sadistic, and psychotic alien with a twisted sense of honor. As such, he is a hypocritical, self-righteous Knight Templar who is willing to destroy the Earth just to spite the Hulk.
- The Dragon: To the Supreme Intelligence, as he is the muscle.
- Hypocrite: He places a bounty on Hulk's head for turning on the Kree during their plan to control Ego/destroy Galactus. He calls Hulk a liar for breaking his word, conveniently overlooking the fact that he had lied to the Hulks about their reason for attacking Ego.
- Killed Off for Real: Got killed while the mothership got thrown into space.
- Evil Overlord: Of Hades itself.
- Magic Knight
- Taken for Granite: He uses the Medusa shield to turn his enemies to stone.
- Happily Adopted: In a Time Travel episode, the Leader informs a young Loki that Odin isn't his real father. He seems to start getting over it.
- Manipulative Bastard: Tricks Skaar into bringing invaders to Asgard.
J Jonah Jameson
- Alliterative Name
- Flanderization: Continuing on from Ultimate Spider-Man, his flanderization from that series is further shown in the episode "All About Ego", where Jameson says that Spider-Man's plan to destroy the world using Ego has failed. Keep in mind Spider-Man was not involved in the episode in any way. Yet in the first episode alone, he actually claimed that the Hulk was even worse.
- Insane Troll Logic: Somehow, he believes Spider-Man was involved with Ego the Living Planet.
- Jerkass: Has it out for both Spider-Man and the Hulk.