It's difficult to write a review about Dragonball Evolution without comparing it to it's source material, mostly because Dragonball Evolution is to Dragonball and Dragonball Z what fish sticks are to chocolate. However, tempted as I might be to mercilessly rant and rave about the changes, I won't do that, much.
First things first, how come every comic/animated show-adaption and their dog has to feature an awkward high school kid whose only wish is to "get the girl." Those are, by the way, more or less the exact wording of the main character as far as motivation goes until the whole "revenge & save the world"-bag comes along. It's not that I hate awkward high school kids, it's that they make for incredibly uninteresting first acts. Also, it's an incredibly blunt way to create a hero the target audience can identify with.
The story of this sad piece isn't what I'd call great either, mostly thanks to some gaping plotholes. Things like "why do the bad guy want the McGuffins
in the first place" should NOT go unanswered. I mean, seriously, just one line of "and then I will be immortal/invincible/in possession of the worlds largest ice cream cone" would do wonders. Also it would be awfully nice if someone actually at one point told us that the incredible mega-powerful energy (well, wind, actually)-attack could also double as a defibrillator/magical revival device, rather than leaving a kame-hame-sized hole in the patient's chest.
When it comes to characters, I'm afraid the movie also fails rather heavily. I mean, none of them are likable. Sure, the main character is one business, but his love interest is easily one of the most unlikable characters I've ever seen. Sure, there's nothing wrong with writing a character with flaws, but when their only actually positive characteristic is "she looks kinda nice, I guess," the screenwriter needs to feel ashamed of himself.
Finally, the most important thing in a movie like Dragonball Evolution, namely the fight scenes. Sadly the choreography is lacking. Instead of being fast-paced, slapstick-y and actually kind of fluid like in the series, it's choppy and nearly static. Sure, copying DBZ' style probably isn't easy on film, but it certainly could be done way better than this.
In short: Not worth watching by itself, but see it with a diehard DBZ fan for some fun times.