Mr. Satan is challenged to a fight by an old rival, and he is taken to an island where the fight is to be held. Accompanying him are Android 18, who is making sure he doesn't skip town before paying the money he owes her for letting him win the World Martial Arts Tournament, and Trunks and Goten, who are stowaways. When they get there they find that the rival doesn't want to fight himself, but rather has created a force of genetically engineered bio-warriors to fight Satan. Unfortunately for everyone involved, one of these bio-warriors was made from the DNA of Broly, and when he is released, all bets are off.
This work contains examples of:
- Advertised Extra: Android 18 is on the poster, but doesn’t actually do much in the movie itself and is soundly beaten by Bio-Broly both times she attempts to engage him in combat.
- Asshole Victim: Maloja-the shaman from the previous movie-attempts revenge on Goten and Trunks by bringing Broly's blood to Jaguar, which eventually results in creating Bio-Broly, and he eventually tries to steal Jaguar's money while everything is going to hell. Jaguar and his cousin Men-Men are saved from the resulting destruction, but Maloja isn't as lucky when the acidic culture fluid enters the room he's stealing said money from and he speaks his last incantation.
- Big Damn Heroes: After Bio-Broly shows up, the movie becomes something of an extended sequence of one character fighting Bio-Broly and nearly dying, only to be rescued at the last second by another character - at which point the characters swap roles. Krillin gets a more traditional example halfway through, as before that point he hadn't appeared since the beginning.
- Blackmail: When Jaguar invites Mr. Satan to come to his castle to fight his Bio-Warriors, he blackmails him into participating by threatening to publish a story about his wetting his bed during summer camp to the papers if he refuses.
- Body Horror: Due to his incomplete formation, after he bursts out of his tank the culture fluid mutates Bio-Broly into a green, semi-amorphous behemoth. It's pretty revolting.
◊ - Came Back Wrong: How the cloning process worked out for Bio-Broly in the movie. The culture fluid in his cloning tank combined with him rather horribly so that he more resembled "swamp monster" than "Saiyan".
- Canon Discontinuity: Though the film is a Non-Serial Movie and therefore non-canon to begin with, Toei and those on their payroll seem very gunshy to reference its events, even in materials that draw upon the films for inspiration. Video games in particular seem unfond of looking in its direction: for instance, Dragon Ball Z: Budokai Tenkaichi 3 had the main villains of every Z-era film be playable with the sole exception of Bio-Broly. He didn't appear in a video game until Dragon Ball Heroes threw him a bone in 2017, and Dragon Ball Z Dokkan Battle doubled those numbers at around the same time—and neither game is known for being selective with its roster.
- Clipped-Wing Angel: It's implied that Bio-Broly was actually weaker than the original: for starters, Krillin managed to last while fighting Bio-Broly, whereas in the previous movie, Broly OHKO-ed Krillin by blasting him into a cliff before Krillin could even land the first strike.
- Clone Degeneration: According to the Daizenshuu 6, Bio-Broly starts falling apart because the culture fluid wasn't done forming his body yet.
- Continuity Snarl / Non-Serial Movie: As a direct sequel to Second Coming, this film shares its inability to fit into the timeline.
- It supposedly takes place after the 25th World Martial Arts Tournament and while Babidi is trying to awaken and control Majin Buu (which should explain Gohan and Vegeta's absences), but Krillin should be with the Supreme Kai and Piccolo trying to stop Babidi.
- Goku is depicted as remaining in the afterlife at the end of the movie, but Goku never goes back there again in the manga or anime and spends his remaining 24 hours on either Earth or the Sacred World of the Kais until Old Kai gives his life to revive him.
- Covers Always Lie: See that cool looking poster art showing Goten, Trunks, and Android 18 firing off a Kamehameha? Android 18 uses precisely one ki blast in the film.
- A Day in the Limelight: For Goten, Trunks, Android 18 and Krillin. They were all the main characters of this film.
- Death by Materialism: Maloja is killed by the culture fluid while trying to steal money from Lord Jaguar.
- Deus Exit Machina: Gohan and Vegeta are nowhere to be found in this movie. According to the guidebooks, they were occupied dealing with Majin Buu. If either were present, the movie would have ended quicker.
- Dirty Old Man: Lord Jaguar has a a somewhat lecherous attitude towards women, as he acts rather pervertedly toward Android 18 when she and Mr. Satan arrive at his island, with #18 responding by slapping Jaguar into a wall.
- Disproportionate Retribution: The big reason that Jaguar goes through all of this trouble, including cloning Broly? He was mad that Mr. Satan beat him in a match in the sixth grade.
- Maloja helped clone Broly solely to get back at Goten and Trunks because they exposed him as a fraud in his home village in the last movie.
- Evil-Detecting Dog: Jaguar has one that barks at Bio-Broly.
- Family-Unfriendly Death: Hei, Jaguar’s dog, is essentially eaten onscreen by the culture fluid, whimpering in pain and terror as it goes.
- Flanderization: A severe case for Bio-Broly. Whereas Broly has the capacity for critical thought and coherent speech, Bio-Broly lacks both. This mindlessness, coupled with the clone's retention of his source material's extreme levels of mental instability and rage, results in the clone being akin to a ravenous zombie that will attack anyone in sight. Hell, in the entire film, Bio-Broly only says one word, "Kakarot".
- Forgot About His Powers: Trunks holds up Goten to see into a window. Trunks complains that he wants a turn to see... both of them forgetting that they can fly.
- Full-Frontal Assault: While in his tank, Bio-Broly is always conspicuously crouched down and away to keep his crotch hidden. As he bursts out, some culture fluid happens to cover his genitals, and his body soon starts to melt away anything that could be recognized as a penis.
- Generic Doomsday Villain: Since the culture fluid is inanimate, Bio-Broly exists just to give the heroes something to fight, and has no characterization beyond a rampaging monster.
- Grey Goo: The culture fluid multiplies when it absorbs a person, the stronger, the better. After absorbing Bio-Broly it expands to cover the whole island but luckily seawater turns it to stone.
- Healing Factor: Bio-Broly has one that can prevent decapitation.
- Hollywood Acid: The culture fluid used in the cloning process turns into this when exposed to air. Naturally, during the fight, a veritable ocean of the stuff is released into the facility and the surrounding island - killing dozens of people onscreen and likely many more offscreen.
- Hope Spot: Trunks and Goten recognize Bio-Broly, and are actually Genre Savvy enough to attempt to off him before he can wake up. Unfortunately, he wakes up in the middle of them charging their attacks.
- Krillin uses the Destructo Disk on Bio-Broly and actually nails him, cutting off his head! Shame Bio-Broly has a not remotely hinted at Healing Factor that heals him in seconds.
- Jerkass Has a Point: Hercule is every bit the fraud that Jaguar believes him to be.
- Kill It with Water: Bio-Broly's weakness is water. More specifically, the fact that touching water causes him to solidify. Realizing this weakness, Trunks, Goten and Krillin use a triple Kamehameha to blast the water by the island so high that the entire island is flooded with sea water, which solidifies all the bio-liquid. When Bio-Broly emerges from the sea as a giant, then turns to stone, due to having been drenched in sea water. Seeing their chance, Goten and Trunks blast the gigantic Bio-Broly statue into smithereens, ridding the universe of Broly for good.
- Mooning: Done by Trunks to trick Bio-Broly into a trap.
- My God, What Have I Done?: When Lord Jaguar discovers the hard way that the Legendary Super Saiyan isn't so easily tamed; at one point, he orders Bio-Broly to stop attacking Trunks only to be attacked himself. As the culture fluid consumes his facility, when Trunks offers to rescue him, Jaguar thinks twice before accepting, believing he deserves to die for his actions. In the end, he's saved by Trunks, while expressing remorse at the consequences of his greedy ambitions.
- Nice Job Breaking It, Hero: Trunks and Goten’s attempt to kill Bio-Broly ends up causing him to wake up and wreak havoc.
- Oh, Crap!: Lots of it, too.
- Goten and Trunks when they realize Broly has been cloned.
- Mr. Satan, when he sees Bio-Broly.
- Android 18 when she realizes she’s suffering from The Worf Effect.
- Maloja when he encounters the culture fluid and ends up dying.
- All the scientists when the culture fluid is released, and as the situation becomes uncontainable.
- Offscreen Moment of Awesome: In the ending, after Bio-Broly's been defeated by Goten, Trunks, and Krillin, Goku learns that he has to go to Hell/HFIL due to Broly acting up and somehow suppress him, to which he ended up delaying finishing his (presumably huge) meal. The fight's outcome, not to mention the fight itself, is never revealed nor shown, as the movie ends right there.
- Off with His Head!: Krillin attempts to cut off Bio-Broly’s head with a Destructo Disk, and the move connects. Too bad Bio-Broly had a Healing Factor.
- Revenge Before Reason: Lord Jaguar's desperation to get revenge against Mr. Satan drives him to clone Broly, knowing the immense danger he would put the world under by doing such a thing.
- Sickly Green Glow: Broly's imperfect clone, "Bio-Broly", degenerates into a green blob monster.
- Superpowered Mooks: Lord Jaguar's Bio-Warriors.
- Taken for Granite: What eventually happened to Bio-Broly once he becomes giant, due to coming into contact with water. His giant stone husk is then promptly destroyed by Goten and Trunks.
- There Is No Kill Like Overkill: Cloning Broly JUST to take out one man is the very definition of this trope.
- 13 Is Unlucky: The 13th Bio-Warrior is a clone of Broly, who turns the lab to hell once he emerges.
- Too Dumb to Live:
- Hey, let's create a clone of a dangerous psychopath and command him to follow our orders! Nothing can possibly go wrong!
- Lord Jaguar's dog... thing thought it was a good idea to attack Bio-Broly and, without looking where it was going, was promptly killed by the culture fluid.
- The scientists who decided to try to take an elevator instead of taking the stairs to escape the culture fluid. When the elevator gets stuck, they decide to open the doors for no good reason whatsoever! No points for guessing what happens next.
- Wouldn't Hurt a Child: Zig-zagged with Jaguar. He's got no problem sending his bio-warriors to fight Trunks and Goten once he realizes how strong the boys are, but he doesn't want to outright kill them.
- The Worf Effect: Android 18 is completely unable to even slightly affect Bio-Broly after wailing on him unopposed for nearly a minute. Even multiple kicks directly to the neck do nothing. He proceeds to knock her out with one slap, leaving SS Goten and SS Trunks to engage him in a fairly even fight.
