Well, I must say I was intrigued when I saw this sitting on the shelf, but when I rented it, I was a little disappointed, mostly because it proved that no matter what you do to parody blaxploitation movies, it always ends up funny. I think it has to do with how awful those movies are. Here's the movie in a nutshell:
Incredibly white Steve Byzinski (I think that's how it's spelled. He even had a theme song with women singing "Byzinski" kinda like in Shaft.) just got out of a mental institution, and he thinks he's a black superhero named John Shat. This is because of an old baseball-related incident from his childhood. So, he's walking along and he gets assaulted by two members of the Martin gang, a couple ruffians who imitate Steve Martin. Whoever thought of that should get an award. Well, his life is saved by a Japanese guy whose lips don't move in synch with his voice, and together they uncover a heroin smuggling ring. The bad guys gather some hitmen together, including three zombies and Trent's hero, Gary Coleman, and they prove themselves incompetant. So, it turns out the Japanes guy is really dead, and the person pretending to be him is his sister in a tutu. She gets killed off, and as she dies, she hands Steve something. It's a baseball with "plot device" written on it. Literally. With the help of Foxy Brown, Steve's psychoanalyst, Steve tracks down the main bad guy and knocks him off a building with the baseball.
All in all, the movie was pretty funny and surprisingly original. I'd rent it again.