Visuals aren't particularly stunning, but manage to capture the look and feel of the film. The design behind Gru and his minions is already strong, which helps when translating the characters for the Wii. There are a few sharp edges, but overall, everything looks exactly the way it should. Minions are distinct and varied (well, as varied as they are in the movie). Of course, most of the time you see minions on the screen they are frozen, inflated or locked into some odd formation, but the thought counts.
Sound is hit or miss. Some of the background tunes are nice, though forgettable the moment you quit playing. The only memorable audio aspects are Gru's comments, though they tend to grate on the nerves after a while. I liked the meta-dialogue and how Gru would make comments on your play style, but only to a point. It's cute and fits the film's sense of humor. However, after repeated deaths, Gru's commentary is borderline insulting.