The Sandman/Von Kreesula's Day Off Mona the Vampire : Season 5 Episode 11

Mona and her friends enter a sand sculpture contest and unwittingly awaken the spirit of a mischievous sandman who seems to be bent on putting the whole town to sleep./ When Count Von Kreepsula and his arch rival Dr. Nefarious go missing from a comic book Mona leads the kids to a comic book convention where an amnesiac Von Kreepsula is about to fall into the clutches of his enemy.