In the final scene when Nami sits on the throne, the front flap of her skirt is between her legs in one shot and draped over her left leg the next.
When Mer-Man is first revealed, the webbing between his right ear disappears for a few frames.
Alan Oppenheimer uses Mer-Man's voice instead of Battle Cat's when Cat says 'Nice Job' to Man-At-Arms.
He-Man's scabbard appears to be empty during all of his scenes set in the underwater city of Aquatica, except during a couple of brief close-up's of his face.
Man-At-Arm's green gloves are drawn to have fingernails during close-ups.
Adam laughs at Cringer in He-Man's much deeper voice.