A plant zombie apocalypse breaks out in Gotham, and Harley fights to save the city, while Ivy embraces her inner supervillain.
Tropes:
- Atomic F-Bomb: The episode ends on Ivy releasing a huge f-bomb to the heavens now that her eden is no more.
- Bad Black Barf: The plant zombies vomit up dark green bile that causes plants to rapidly grow and turns people into plant zombies.
- Bathos: Bruce and King Shark have a heart to heart about the loss of their parents, and how they can move on with their lives afterward... while the zombified Thomas and Martha follow them around and eat cats.
- Bonding over Missing Parents: Played for laughs. The recently-orphaned King Shark tries to help Bruce through losing his parents...after Bruce has caused a Zombie Apocalypse in an attempt to bring them back, decades after they died.King Shark: Okay. Now I am judging. It feels like you should be much further along than this. I mean, you're obsessed about the past and missing out on the present and also starting a zombie apocalypse.
- Botanical Abomination: The undead-plant hybrids, whose vomit creates more plants or undead.
- Call-Back:
- The Jazz Fest (the "Jazzapajizza" of the episode's title) that got canceled back in "Devil's Snare" due to Joker, is back on again at Gotham Central Park.
- Harley's enjoying the Batwing the same way she enjoyed the Batmobile in "Finding Mr. Right".
- Ivy brings up her thing about kitten heels again. And she mentioned before about "Mama Macaroni's" being her favorite restaurant, so the apocalypse not touching the place tips off Harley.
- Came Back Wrong: Bruce's parents and everyone else are resurrected as plant/zombie hybrids, but he figures he can fix that with a bit more experimentation.
- Dissonant Serenity: Bruce acts creepily serene about his parents coming back as zombies, then a rampaging apocalypse of such, and then having to kill and bury the parents over again.
- Dramatic Irony: As Bruce refers to himself as "Gotham's last line of defense from total chaos" to his parents… who were the first two in a veritable Zombie Apocalypse to which Bruce seems oddly oblivious.
- Even Evil Has Standards: Harley has been very supportive of Ivy's plan to terraform Gotham by reviving dead, ancient plants underneath the city, but after Bruce modified Frank to revive humans that become plant-hybrid zombies and Ivy decides to use the zombies to resume her plans, Harley ends up drawing the line when innocent people are getting hurt in the process.
- Fatal Family Photo: Harley has a photo of Ivy with her in the Batwing, though the trope is spoofed when it's shown to be a picture of Ivy coming out of the shower, covering herself with a towel and trying to block Harley's camera. The "Fatal" part comes into play when Harley sacrifices herself to force Ivy to choose between saving her or continuing her plan.
- Forgot About His Powers: Despite his shapeshifting powers, Clayface doesn't try to get free from his bindings and just waits for Batgirl to free him like the others.
- Freudian Excuse Is No Excuse: Played with. King Shark takes issue with Bruce's unresolved trauma with his parents driving his actions not because he doesn't think it's a valid excuse in itself, but because Bruce has been holding onto that trauma for decades and really should be further along by now.
- Friendly Zombie: Bizarrely, Bruce's parents are the only zombies to be revived without a desire to vomit on everyone in sight and dutifully follow Bruce around. Though Zombie Thomas does start eating one of Bruce's cats when King Shark needs to make the point that Bruce has perhaps gone too far.
- The Friend Nobody Likes: To the extent that Dr. Psycho can be considered a friend at all, Harley responds to him being zombified with a declaration that they need to solve the problem before it affects someone they actually care about.
- Friend-or-Idol Decision: After seeing how Ivy is going too far with her plan, Harley purposely gets herself infected and makes Ivy choose between terraforming Gotham using the zombies or undoing her plan in order to save her from becoming a zombie. Ivy chooses Harley but isn't happy that her plan is ruined.
- Garden Garment: Ivy swaps to a plant outfit when she takes on the power of the Green.
- Gosh Dang It to Heck!: Batgirl's style of cursing, which Harley finds annoying.
- Hypocrite: Nightwing and Batgirl make a big deal to Harley about how they never kill under any circumstances no matter who that person is and what they've done. Then a few minutes later decide rather quickly without considering any other options that Ivy's too powerful and they net to make an exception to their rule.
- I Need a Freaking Drink: In the spirit of the trope, Frank rolls himself a blunt after being used to revive the dead and wading through the zombie horde.
- Immediate Self-Contradiction: King Shark assures Bruce that he isn't judging him for how he handles his trauma. Then he recalls that Bruce's parents died when he was a child and Bruce still isn't dealing with it in a healthy way, so he's totally judging him for it now.
- Instantly Proven Wrong: Batgirl assures the crew that Bruce would never do anything to endanger the lives of others. Moments later, he steps in to introduce his zombie parents and they realize that the entire cemetery has been reanimated.
- Internal Reveal: Harley reveals to Nightwing and Batgirl that she knows that Bruce Wayne is Batman after entering his mind despite them trying to deny it.
- My God, What Have I Done?: Bruce finally realized how badly he screwed up when King Shark reveals he accidentally started a zombie apocalypse all because he couldn't properly deal with the trauma of losing his parents. To make it right, he decides to re-kill his zombie parents, but King Shark offers to do it to spare him the pain.
- Mythology Gag:
- Harley and Ivy together have been through other Zombie Apocalypses in two separate comic continuities; one of Harley's own self-titled solos, and DCeased.
- The Batwing does the maneuvers and crashes the same way from Batman (1989), accompanied by the film's theme music (but no missiles used now).
- Nice Job Breaking It, Hero: Bruce intended to merely raise his parents from the dead, but rather than do so under controlled conditions (morbid though it may be, digging them up and performing the experiment in his lab would have been the proper course of action), he just stuck Frank into the ground near their graves and pumped the modified Eden serum into the root system, resurrecting every corpse in Gotham.
- No-Sell: King Shark marches through a horde of zombies and his only complaint is that their clawing "tickles".
- Pet the Dog: King Shark offers to kill Bruce's zombie parents so he won't have to deal with that trauma, even advising him to cover his eyes and ears so he won't witness the deed.
- Pinocchio Nose: Dr. Psycho grows a branch from his nose when he tries to lie about having been exposed to zombie barf. Clayface immediately lampshades that it's obvious even by his standards.
- Revisiting the Roots: Ivy now wears a combination of her traditional outfits from the comics and Batman: The Animated Series.
- Screw This, I'm Outta Here: When Robin, who's playing a video game, is introduced to Bruce's dead parents and he sees them vomit and grow a plant out of the vomit, he calmly walks away while playing his game without even saying a word.
- Sexual Euphemism: The episode's title; but Frank more blatantly connects to sex how he was used to bring the dead back.
- Shoot the Dog: Bruce reluctantly comes to the conclusion that he has to put down his zombie parents, but King Shark offers to do the deed for him.
- Shrug Take: Swamp Thing appears to Ivy in the Green and tries to talk her down from her supervillainy. When she refuses, his reaction is basically "Oh well".Swamp Thing: Oh, boy. I biffed that speech.
- Skewed Priorities: The band keeps performing oblivious to the apocalyptic chaos all around, and Bane only wants to discuss his issues with his now zombified therapist.
- Skyward Scream: The episode ends on Ivy giving one after being forced to shut down the Plant & Zombie Apocalypse and end her plans.
- Spanner in the Works: When Harley isn't able to convince Ivy from stopping her plan, Harley sees Bane in the area who's trying to get counseling from his zombie therapist. When his therapist is about to vomit and infect Bane, Harley jumps in front of Bane to get hit with the vomit so she'll get infected and make Ivy choose between her plan or her.
- Superman Stays Out of Gotham: Literally that, along with all the rest of the Justice League; unlike the previous monster plants/trees rampage in Season 1 that brought them over immediately, none show up today. After everything they've been put through in Gotham previously, it's understandable they'd all rather steer clear of Batman's madhouse city.
- Suspiciously Specific Denial: When Frank tells the crew to avoid coming into contact with the zombies' vomit, Psycho tries to hypothetically ask what happens if you do get sprayed by the puke, only for his nose to immediately turn into a branch. It's lampshaded by Clayface.
- Taking the Bullet: When Harley sees Bane is about to be vomited on by his zombie therapist, she purposely jumps in front of Bane to get hit by the vomit to get infected so Ivy would stop her plan. Saving Bane was just a bonus, and he even decided that was enough to forgive her about the pasta maker.
- Thou Shalt Not Kill: The Batfamily’s policy against murder extends to only giving the Batwing nonlethal weapons, leaving Harley without any missiles to re-kill the zombies with to her frustration. Ironically, Batgirl and Nightwing later consider making Ivy an exception to the “no killing” rule if it means stopping the zombies, but Harley convinces them to give her a chance to talk Ivy down.
- Transformation at the Speed of Plot: Going from human to zombie seems to be proportional to the character's importance to the plot. For Psycho and Harley, it takes a minute or two, while nameless extras transform in an instant.
- What Happened to the Mouse?:
- Alfred is not seen anywhere since the previous episode.
- It's not shown if Bruce and Shark saved the cats from getting eaten.
- Joker disappears after opening Jazzapajizza Fest and introducing the band.
- "Well Done, Son" Guy: When Ivy tells Nightwing Bruce is never gonna say he loves him, unaware of the full nature of their relationship. He looks away implying she touched a nerve.
- World-Healing Wave: Ivy releases a healing wave that reverses all the changes wrought by the Eden serum, including reverting Frank to his original form. It doesn't clean up the corpses or get rid of all the vines, however.
- Zombie Apocalypse: Thanks to Bruce using Frank to revive his dead parents and unintentionally reviving other dead bodies in Gotham, the zombies that rose up are mixed with plants and when they vomit on their victims, they become zombies. After Ivy undoes the apocalypse to save Harley after she got infected, the people who were previously infected return back to normal and the already dead people brought back to life drop dead for good.
- Zombie Infectee: Dr. Psycho is hit by zombie barf offscreen and tries to ask what might happen "for a friend". Everyone sees right through him.
- Zombie Puke Attack: The plant-hybrid zombie vomit can instantly grow plants on the ground. If the vomit gets on anyone, then they'll become either a zombie plant rooted to the ground and unable to move or a mobile zombie with plants growing out of them.
