The special effects are not special at all. You can always see the white wires when Monkey Boy (aka Goku) is flying, and Oolong is a chubby guy in full blackface. It’s a proverbial trainwreck.
The upside is … it has character. It’s so bad, it’s good. All the names of the characters are different because the creators didn’t have production rights to Dragon Ball.
In Dragon Ball: The Magic Begins, Goku is Monkey Boy. Gohan Sr. is Sparkle. Muten Roshi is Turtle Man. Oolong is Piggy, and King Gourmeth is King Horn.