The Dark Marauder

Voldemort taking Harry's blood woke something in our young Gryffindor; something dark, twisted and truly malicious to the core; now calling himself the Joker, Harry seeks to show the world and Hogwarts what a REAL Marauder can do: after all, it's only a joke; what harm can a joke do? Snapped Harmony; OOC Characters; VERY slight Batman XOver; Rated M for violence/themes etc.