Invasion from Planet Dork — Greg Trine

A few million miles away from Los Angeles, danger is lurking. Evil aliens with some seriously hard to pronounce names like Zzykrkv are visiting earth from their home planet, Dork--to kidnap earthlings for their science class
While busy on a snack food errand . . . uh, mission . . . Melvin Beederman, official superhero of Los Angeles, senses that something doesn't feel quite right. Can Melvin, Candance, and friends from the Superhero Academy prevail over extraterrestrial bad guys with a spaceship powered by a Gamma drive? Holy alien invasion