Mystery in Petbridge

 is the TBD episode of Season TBD of The Pet Adventures of Lego, being a crossover with Scooby-Doo.

Plot
Scooby-Doo and the gang travel to Petbridge and recieves help from Lego, Wag and Rose to solve a confusing mystery about a haunted mansion.

Regular

 * Josh Keaton as Lego
 * Bill Fagerbakke as Wag
 * Tara Strong as Rose
 * Rob Paulsen as John
 * Grey DeLisle as Mattie and Daphne Blake
 * Maurice LaMarche as Velcro/the Canterville Ghost
 * Tress MacNeille as Stella/Mrs. Hyde
 * Dee Bradley Baker (uncredited) as Lego, Wag and Rose's vocal effects

Guest stars

 * Frank Welker as Scooby-Doo and Fred Jones
 * Matthew Lillard as Shaggy Rogers
 * Kate Micucci as Velma Dinkley

Credits

 * Writers: TBD
 * Storyboard Artists: TBD
 * Directed by: TBD

Quotes
(Fred removes the Ghosts' masks and reveals Velcro and Stella)
 * Fred: Two cats?
 * Lego: They aren't any cats, they are our old nemeses: Velcro and Stella.
 * Shaggy: Like, this is so weird, man!
 * Scooby: Ryeah.