Rocky, Colt and TumTum must battle an evil wealthy toxic waste dumper in order to save a local Indian tribe and their friend Joe. The 3 Ninjas must help find Joe's father and find a secret disk that contains evidence that could stop the toxic landfill that is destroying the Indian community. However the town is owned by the rich man and he controls the police and even the mayor. They must fight a motorcycle gang and renegade cowboys in this non-stop ninja adventure.
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Currently 3 Ninjas Knuckle Up full movie is available for streaming online, rent, buy or watch for free on: Apple iTunes, Google Play Movies, Amazon Video, Microsoft Store, YouTube, HBO Max, Vudu, DIRECTV, Tubi TV
3 Ninjas Knuckle Up is a 1993 American martial arts comedy film taking place in between 3 Ninjas and 3 Ninjas Kick Back. The film was directed by Shin Sang-ok, using the pseudonym "Simon Sheen". The film was shot in 1992, the same year the first film was released, but was not released until 1995.