Spirit Warriors the Shortcut (2003)

Picking up from where they left off, the Spirit Warriors stumble upon a black hole to the Netherworld in their search for an ancient mystical, powerful amulet. Now that they have found the way in, they need to figure out how to get back, especially as the Netherworld's dark denizens spring into action to give the spirit warrior a taste of their gruesome never-land hospitality.