Welcome to the Underworld

Katie,Milly and the CMCs visit The Grim Adventures of Billy and Mandy Universe.Meanwhile,Nyx accidentally summons spirits of the Underworld.
==Episode Summary==
to be added....
==Background Information==
*Dimensions featured
**The Grim Adventures of Billy and Mandy Universe
*Characters featured
**Billy,Mandy,The Grim Reaper
==Continuity==
to be added...
Category:Fanon Works