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Jimmy Lee: Hey! Broom heads!
Billy Lee: We're gonna sweep the floor with your skulls.

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Koga Shuko: Your incompetence sticks needles into the flesh of my honor.

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Koga Shuko: You think I'M bad, wait'll you meet my lawyers!

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Billy Lee: My whole life just flashed before my eyes! Dude, I sleep a lot.
Jimmy Lee: Are you crazy? We almost wrecked our CAR!

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Jimmy Lee: Listen, Dragonfly, I tell you when to tag me.
Billy Lee: Don't call me Dragonfly!

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Koga Shuko: You're weak like your father.
Billy Lee: You're ugly like your mother!

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Trivia: Plot and visual elements of the film were reused in the 1995 fighting game version of Double Dragon produced by Technos Japan. This includes the transformation that the Lee brothers go through during the film's climax, which appear in the game as a special move for both characters; and the use of footage of the film in the game's introduction and Marian's stage.

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Trivia: When Billy is fighting evil Jimmy, he says "Shadow demon, you shall not pass." Look behind Billy. The actual Double Dragon arcade machine is behind him, which evil Jimmy then kicks. (01:17:40)

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Continuity mistake: Jimmy and Billy fall down the elevator first, followed by Marian. Yet at the bottom Jimmy's head is on top of Marian on the ground.

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Continuity mistake: In the boat chase, the distance between the boat and the jet skis keeps changing between shots.

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Continuity mistake: Jimmy and Billy are ambushed by the gangs after their car breaks down. Jimmy stomps a bar that smacks several guys in the nuts. There is fridge besides him and the door is propped up in one shot but down in the next.

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Continuity mistake: After the girl is killed at the theater, Billy and Jimmy's car breaks down and they begin arguing by the river. Jimmy's hair is different between shots in how the wind is blowing it, despite him not moving.

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Continuity mistake: The girl hits the super Abobo with a punching bag and sends him flying. The next shot shows her walking away from the bag. Moments later, she is by the bag again and then begins walking away from it once more.

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Continuity mistake: Once they have the car wreck in the ally, a bird's eye view shows the good guy's car still having the exhaust at the top with fire coming out as they open their doors to get out. Very next shot, still showing them getting out, the fire is now out.

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Continuity mistake: When Abobo and Hawk are chasing Billy and Jimmy in the car, Billy throws a can of stuff in the fuel feed of the car. This causes a super combustion that propels the car towards the concrete railings of a bridge. Shots of the exterior show a different type of wall beside them. The car blasts forward and there is a tunnel a few yards in front of them. Switch to interior again and it shows bridge railings with no sign of the tunnel with prolonged speed towards same direction.

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Revealing mistake: When they are stopped after curfew by the Mohawks, Hawk jumps at the window and orders them to give them 50 bucks to go on, and they accept credit cards. When saying this, you can see the dividing line between his real skin and the fake head cap that supports the actor's fake hair.

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