"Evil" is used to describe Villains, people who often plan to do good things, but come out bad. Sometimes they plan to conquer "the world", sometimes they just destroy stuff. See also Actual Evil.
Evil has been sealed off into another Dimension, and away from the mixedbag realm allowing for so-called 'villains' to come out and do what they think is evil. They think they're hardcore, or like the Doctor Doom of Villains but they end up looking like the Doctor Doofensmirtz of Villains. This is the Wussified, PG-13 (or probably G or PG) evil you'd see in a kid-friendly, Disney-wannabe company's movie.