 The crew were just hypnosis victims under Mysterio's power.Mysterio's true motive was that the meteor itself is pure gold and he was going to steal it to make himself rich, but then he is stopped by Scooby.At this time, a volcanic reaction hits, and the gang deduces the forces of the triangle want the meteor back, so they drop it back in the water, and some steering by Fred narrowly gets the galleon out of the ring as it crumbles into the sea.