Fan Casting Ernest Meets 3 Ninjas (1993)

A group of trained agents search for the hidden files to help them send deadly weapons to their cooperated dealer in Japan with $500M as their reward. Meanwhile, Ernest P. Worrell had recently moved to a peaceful neighborhood where he's neighbors with in the Douglas and befriends Rocky, Colt and Tum Tum. He learns that they are ninjas and wants to train in martial arts. In addition a girl next door named Judy who they also befriend later gets caught up in a love triangle between Rocky and Colt while Ernest sympathizes with her single mother and forms a relationship with her. The kids soon discover the agents' hideout and plan, but they are now on the run with Ernest accidentally tagging along. Unfortunately, he has no experience in fighting, so their Grandpa teaches him how to become a ninja like his grandkids to help them stop the agents before they get away. All while their father Sam Douglas is teamed up with Ernest's friends, Chuck and Bobbie (who are now detectives) to also go after the agents as well.