3 Ninjas Knuckle Up

3 Ninjas Knuckle Up is a 1995 American martial arts comedy film and a sequel to 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 in the United States until 1995. Plot 14-year-old Rocky, 13-year-old Colt, 8-year-old Tum Tum defend "Truth, Justice and the American Way", once more - this time, protecting a Native American village and the rest of society against a toxic waste company. During a summer, the boys are staying with Grandpa Mori when they witness the Native Americans protesting against the waste industry and the fight soon breaks out while Mori and the boys are ordered to drive away by the authorities. The next day, Colt and Tum-Tum encounters the same group of men led by J.J. harassing and assaulting a girl named Jo from the protest, at the pizza parlor, after she demands they tell her about her father's whereabouts. Colt, Tum-Tum and Rocky step in to protect her by fighting them and getting cheered on by the admiring customers. After fending off the men with their martial arts techniques, they are praised as heroes which gives them big heads. However, the boys are put to work by Mori and the owner of the pizza parlor to work off damages from their fight. Mori tries to teach them a lesson in humility, but the reference of a flower blooming goes over their heads. Jo comes to the boys later at the pizza parlor and explains that the men are under the employ of Jack Harding, an industrialist who is illegally dumping toxic contents into the Native American reserve. Without proof, they can do nothing. Jo's father Charlie had gone to investigate, but he has not returned. Colt, who is seemingly attracted to Jo, agrees that they will help and find her father. The boys follow and sneak into Jack's waste management and overhear his conversation with the Mayor about corruption and find Charlie imprisoned. The boys manage to fight off the some of Jack's men and escape which they report to Jo. That night, they mount an escape plan for her father, which is successful. They spend the night celebrating with the tribe and getting thanks for helping them.