Spirit Warriors: The Shortcut (2003)

Starting from where they last left off, the Spirit Warriors stumble upon a black hole to the Netherworld in their search for an ancient mystical and powerful amulet. Now that they've found a way in, there comes the problem of how to get back - especially as the Netherworld's dark denizens spring into action to give the Spirit Warriors a taste of their gruesome never-land hospitality.