I had long wondered how Josie & The Pussycats could manage to join forces with Scooby-Doo and the Mystery Inc. team on a case when they were traveling through space on their own show. Well, the answer is that this adventure took place during season 2 of The New Scooby-Doo Movies, which proved that the band did manage to come home, but we don't know if this actually took place before or after their space trip.
"The Haunted Showboat" has the two groups trying to stop some counterfeiters. Plenty of work for Casey Kasem (Shaggy & Alex Cabot), who also voices one of the villains, and Don Messick (Scooby & Sebastian), as per usual.
Again, the animation and slower pace drag this one down. Both groups have seen better times.