Pizza World is a skidoo location. It appeared in the Blue’s Clues & You! episode, "Blue’s Big Neighborhood Adventure" from Season 2. I still don’t remember… but it’s a recap.
In the Skidoo segment and the the end credits of the episode, "Blue’s Big Neighborhood Adventure", there was an instrumental version of the Cheesy Pizza song playing in the background, Mr. Oregano appeared in the credits.
End Credits: