Watch Scooby-Doo! Curse of the Lake Monster (2010) HD Full Movie Free on SolarMovie. Watch Scooby-Doo! Curse of the Lake Monster (2010) online free. School is out and the familiar Scooby gang are looking to enjoy a long vacation. However, sightings ...School is out and the familiar Scooby gang are looking to enjoy a long vacation. However, sightings of a Lake Monster cause them to band together once again to solve yet another mystery.