A new mutant known as "Muckman" becomes famous as New York's new "monster hero".
- Bittersweet Ending: Played for Laughs. The Turtles gain an ally in Muckman and are able to keep their existence a secret, but in the process, they disobeyed Splinter and thus they're still grounded.
- Body Horror: Some of Muckman's bones and flesh are exposed post-mutation. And of course there's Joe Eyeball exiting his body.
- Continuity Nod: Quite a few are made in this episode.
- Before Garson becomes Muckman, he mentions that he's glad he's no longer in the sewers because there are too many freaky mutants down there.
- At the end of the episode, Muckman mentions the Pulverizer when he lies to the news to cover up the Turtles' existence.
- The Conscience: Joe Eyeball, who was Garson's left eye when he was human, is this for Muckman. He instantly knows that Bebop and Rocksteady are not good guys, and tells Muckman not to work with them. He also convinces Muckman not to kill the Turtles and to become their friend.
- Foe-Tossing Charge: Rocksteady plows through Michelangelo, Donatello, and Raphael to make his retreat. Michelangelo lampshades this and calls out Raphael for insulting him and pissing him off.
- Freeze-Frame Bonus: Baxter Stockman can be seen working on what appears schematics to a robotic body on his computer.
- From a Certain Point of View: Bebop and Rocksteady claim the Turtles mutated them, which in a roundabout way is true; since it was their interference during "Serpent Hunt" that lost them Karai and subjected them to their mutation.
- Hero with Bad Publicity: Hilariously subverted, despite being a disgusting walking pile of ooze, the citizens of New York aren't afraid of nor do they hate Muckman, in fact they chase him around everywhere because they can't get enough of him. This annoys Muckman who just wants to be left alone.
- This one is played straight for the Turtles, however.
- Horrifying Hero: Garison Grunge was just an ordinary garbage man before he became Muckman, afterwards he sees the Purple Dragons mugging a man and beats them up. At first, it looks like the man he saves is gonna freak out, but he actually thanks Muckman for what he did, and tells a woman who happens to walk by and freak out, that Muckman isn't a monster, but a "Monster Hero."
- Hypocritical Humor: Mikey at one point complains that Bebop & Rocksteady are driving the same conspicuous van (a van with the inspiration for their names on it), to which Raph retorts that them and the Party Wagon are perfectly inconspicuous... As they hit two other cars while trying to parallel park, causing the alarms go off.
- To say nothing of how the Party Wagon itself sticks out like a sore thumb.
- I Am a Monster: This is what Muckman believes about himself after he becomes a walking pile of ooze and muck.
- I Just Want to Be Normal: Before becoming Muckman, Garson Grunge was an ordinary garbage man, and all he wants is his old life back.
- No Good Deed Goes Unpunished: In the episode, Splinter had grounded the Turtles for being exposed to the public (by accident) when they were chasing Muckman. By the episode's ending though, despite making amends with Muckman, and in return, Muckman saving them by saying they're just people dressing up, like the Pulverizer, the Turtles (as well as April, presumably) still get the shit kicked out of them by Splinter because they left the lair when they were still grounded.
- Offscreen Teleportation: Used by Splinter when trying to stop the Turtles from sneaking out, and again at the end when April tries to sneak away.
- Reluctant Monster: Muckman hates what he has become, but at least the citizens of New York don't hate him, in fact after he is witnessed saving a man from the Purple Dragons, he develops quite a following of fans. This annoys him, because he just wants to be left alone. At the end of the episode, he seems to accept what he has become, and has made friends with the Turtles.
- Roaring Rampage of Revenge: Initially Muckman believes the Ninja Turtles are responsible for what happened to him and goes after them, even briefly teaming up with Bebop and Rocksteady to try and beat them. Eventually he becomes friends with the Turtles and covers up their existence from the news, flat out lying that they aren't mutants, just people wearing costumes, "just like the Pulverizer".
- Screw the Rules, I'm Doing What's Right!: The Turtles sneak out to stop Bebop and Rocksteady after they've been grounded. But even after saving the day, their grounding is still in effect.
- Shout-Out:
- The name of the episode is one to The Toxic Avenger.
- There's also one to the YouTuber Andre the Black Nerd, who is one of the biggest YouTube personalities to regularly review the show and has interviewed the cast multiple times. The opening fight that ends with Muckman getting mutated has Bebop call out, "That's it. I'm outie 5000!" before turning invisible and bolting. note
- Muckman's defeat of the Purple Dragons is a shorter, less-brutal and bloody version of Toxie's defeat of Cigar Face and his goons.
- Tactical Withdrawal: Rocksteady orders Bebop to disappear and take the Reagent X Chemical back to the Shredder, while he stays behind to deal with the Turtles because "We cannot return to the Shredder with the empty hands!"
- Taking the Bullet: Rocksteady places himself in front of Bebop and takes some laser fire from a hidden Kraang Gun before destroying it. Normally what would seriously hurt or possibly even kill other characters only irritates Rocksteady, and bounces off of him because of his thick mutant Rhino skin.
- Title Drop: From Michelangelo himself.
- Took a Level in Jerkass: While Splinter has always been somewhat abrasive in his parenting, here he really takes the cake. After finding out his sons got caught on live TV, he spends the rest of episode yelling at them for being careless, angrily silencing Raph's counterpoint that they were slimed with toxic puke note and shooting down Leo and Donnie's attempt to reason with him that Muckman's dangerous since he took them down. He then grounds the Turtles and forbids them from leaving the lair until he decides that he can trust them to watch themselves. He even goes as far to break the TV with his cane and take away Mikey's video tapes. Even after they fix the situation, he ungratefully whacks them (while destroying Mikey's T-Phone) for disobeying his orders while declaring they're still grounded.
- Ungrateful Bastard: Despite the fact that the Turtles managed to restore their secret, Splinter still whacks them and declares they're still grounded. While his anger towards them for sneaking out is understandable, he could've at least thanked them for doing what they thought was right.
- What the Hell, Hero?: Splinter is none too happy when the Turtles are caught on tape by Grody and grounds them.Splinter: HOW COULD YOU ALL BE SO CARELESS?! Secrecy is the most important rule of the ninja, and you have broken it!
- He's similarly displeased when April covers the Turtles' escape from the lair.
