Rick Miller

Three thousand years ago in the Moonlands, the evil Shadow Magi Agram was sealed inside the planet's Core by the Core Glyph and the Dreamstones which provided its power. Now he plans to escape by using his Shadow Geysers to weaken his prison in order to bring the Moonlands under his control, and only a Magi known as the "Final Dreamer" can stop him. A young boy from Earth, Tony Jones, is summoned into the Moonlands as he is believed to be this Final Dreamer (imdb)

The lush and tropical paradise of Turtle Island is the domain of the wise and benevolent turtle king Tiki and his loyal subjects. They happily dwell on their dream island, but trouble lurks on the horizon in the form of a crew of dastardly pirates intent of seizing Turtle's Island's enormous box of treasure.