I can accept the fact this was the NEXT karate kid so Ralph Macchio can be happily retired from the series, and while Hillary Swank is great for the role....the plot to the movie is just dreadful.
Mr. Miyagi's old buddy from World War 2 dies, leaving his widow to take care of her rebellious grand-daughter when her parents die in an accident. The girl has no discipline yet is the hero because the local ROTC...which I'll explain in a minute, has it out to get her. You know the drill...Miyagi takes her under his wing and in the end they beat the bad guys and everyone lives happily ever after.
Its hokey, its cheesy, its the 90's....but that's not even the long and the short of it. My first case of "huh?" is why is there a "military division" in high school? I thought that stuff went out in the 1960's, especially in a public school. As much as Michael Ironside kicks booty in his role as the main heel, since when is military involved in a high school? My next gripe is that during the prom scene, the militants bungee jump to scare the crap out of people....why? The thing I noticed throughout all 4 movies was at the very end the heels suddenly turn face after all the nonsense they put the main character through (Billy in part 1, Sato in part 2, Kreese in part 3). This movie is no different. After Ned and cronies basically sabotage the senior prom, blow up Eric's car and threaten Hillary Swank the whole movie.....Ironside tells them to beat her up and they're like "um...no" If you're gonna do pathetic face turns, at least make sure the characters haven't done anything too over the top such as blowing up a hot rod.
As for the rest of the love plot between Eric and Hillary Swank....corny but nothing to melodramatic, which is a breath of fresh air from the garbage Ralph Macchio pulled in the first 3 movies.
I will say for its own movie, after watching the first 3 movies, I can accept it being more or less a spin off...but I can't accept the whole military thing, way too uncommon for it to be taken seriously. Now if Ironside and crew was a wrestling/football team and he was the coach, THAT would have been more believable.
Ironside and Morita deliver the goods, Swank is OK...the rest are the same as anything, the one highlight is when they blow up the hot rod, THAT was cool 4 out of 10