Gueillermo del Toro’s Pacific Rim starts out as an A, drifts into a C and ultimately becomes a better-than-average B movie. The geek-tastic premise: to fight gigantic sea monsters, the nations of earth have created huge robots co-piloted by warriors who mind-meld to spar with the modern-day godzillas. Charlie Hunnam is earnestly appealing and the creature effects better than average. The flick is best when it espouses its bizarro mythology or plumbs the depths of the protagonists’ emotions, even though most are just Starship Troopers deep. Still, it’s a worthy adventure yarn and should appeal to the 11-year-old-boy-brain that yearns for a summer movie that is filled to the rim with adventure.