I'm trying to find an old movie that I vaguely remember, about a boy whom is taken by a taxi driver of some sort in a small town in the canyons or something who turns out to be an alien when the taxi starts taking off and flies into space where the boy is needed to help fight a battle because he was so good at playing an arcade game that he clocked.

The Last Starfighter (http://www.imdb.com/title/tt0087597/)

This site is good. The Internet Movie Database (IMDb) (http://www.imdb.com/) do you know any of the character names maybe I can try to look it up for you