Scrappy's Birthday/Sir Scooby and the Black Knight/Scooby in Wonderland

Plot:

Shaggy and Scooby reminisce about the chaotic Scrappy's birthday. / Shaggy, Scooby, and Scrappy escape the clutches of a spooky armored specter. / Scooby and Scrappy dream about cavorting with a Mad Hatter.