Uninhabited Coolsville is the 6th and final level in story mode in Scooby-Doo! And The Infinity Gem
In the first cutscene the gang is driving to Coolsville, but when they get thier it looks like a wasteland. The mayor is nowhere to be found and the gang is puzzled. A ghoul made of gems wathes them from a high tower as they begin thier investigation.
As Shaggy or Scooby walk to the town hall. Follow the dog tags until you get to Mayor Fey's office. Enter it. There will be the first villain,mini-robots. After defeating them grab the clue, a note from the mayor.