first lets talk about the actors- Goku was not supposed to be that puny, the hair was wrong. he looks more like a teenage gohan. even master roshi pronounced gohan wrong. none of the charatcers looked or feel like in the DBZ world. piccolo is supposed to have the namek suit and those things on his head, and the turban. The reason why the dragonball anime was so popular was because the author put so much effort into it, i bet he put more effort then the people who made this garbage. he also added his own style, everything from the characters, the environment(its a different earth you know), to the story, in his own way and put it together so perfectly that it was a masterpiece. Now if you changed what the writer put such as the story and characters, it becomes crap.
the story- Goku going to school? who wants to see that? It should have started from when goku fights the saiyans, when all the actions really starts. in this movie, goku is supposed to be small like 9 years old but very powerful and bulma is supposed to be like a teen. Oh yeah, the jokes in the movie were not good at all. The fight scenes using strings made it look fake. Goku turns to a gorilla in the movie but its supposed to be twice as big as king kong, in the movie hes like only 1 foot bigger. And Goku cant turn unless he still has his tail(it was cut off when he was small), thats the only way you can stop the transformation. the dragon is supposed to be skinny and much longer, in the movie it had a pot belly haha, thats what happens when americans turn a japanese manga into a crappy movie. I can tell the producer or writer didnt know anything about the manga, their kids probably just watched it.
if only they had mixed it with superman effects like flying, speed and made the monkey look like king kong destroying the cities it would have been better.