Earthboy Jacobus (2005) GN

Chief Edwards retires from the Modesto Police Department a lonely man. On his way home, he hits a flying whale with his car, opening the beast's mouth to find a boy from a parallel universe named Jacobus. Chief discovers that a society of insect monsters want to kill this boy due to a mysterious virus that grows on his hand. He becomes a father figure to the boy and trains him how to survive insect monsters by becoming a great American ass-kicker.