Tooth or Consequences (Nightmare Ned)

"Tooth or Consequences" is an episode of Nightmare Ned.

Synopsis
Upset after loosing his last baby tooth, Ned hides it so the tooth fairy can't find it. In his dream, the tooth fairy visits and convinces Ned to come back with her to Tooth Land. However, Ned learns that she actually plans on robbing him of all his teeth, and the only way for him to keep them is to beat an old wisdom tooth in a game of checkers.