"Pacific Rim" is epic action art for those who love robots and monsters. This monsterfest is a hybrid of just about every major cinematic genre. It showcases the grandest traditions in war, sci-fi, post-apocalyptic, alien, monster, and robot movies. Full of mechanized mayhem, it taps into that primal fondness of seeing two big things tearing each other apart. It may be a generic, familiar, and cliché-ridden piece with cardboard characters, but it still wins its target audience over through the visceral