Complex sentence: Megamind (Will Ferrell) is a super-intelligent alien and the supervillain of Metro City who continually battles-and loses-against his nemesis, Metro Man (Brad Pitt), a rivalry that has extended since the two arrived on Earth as infants.
Split into simpler sentences: Megamind (Will Ferrell) is a super-intelligent alien and the supervillain of Metro City. He continually battles-and loses-against his nemesis, Metro Man (Brad Pitt), a rivalry that has extended since the two arrived on Earth as infants.