The biggest heroes in the DC Universe know just who to call when they've got a supernatural problem, and that means the Mystery Inc. gang is in for some of their strangest cases yet.

Scooby-Doo and the gang work to rescue the Flash's villains from the sinister ghostly Top, and also work with Batman and Black Lightning to solve more mysteries.

From Western bounty hunters to superheroes, everyone needs help from Mystery Inc.! Scooby-Doo, Shaggy, Velma, Daphne and Fred pack up the Mystery Machine and head to the hippie city of Karma Corners...and everything seems groovy until a group of ghostly parents forces the party to end! Can the team--assisted by Green Lantern and Green Arrow--find out what these guilt-causing ghosts truly want from the town? Then, Scooby and his friends learn more...

Accused of stealing a sacred gem, Lenni is chased to Earth by the Manhunters and it is up to Batman and the Green Lantern to help him find Lobo, the real culprit.

It is a battle of wits when the Martian Manhunter challenges Batman to penetrate his baffling array of shape-shifting disguises, but when the game goes awry, can the two heroes defeat the most unexpected menace of all?

When Kandor is threatened by a plague of thefts, Superman and Batman shrink down to super-small size to unravel the mystery.