in the museum
There was no demo. There was a game called "Spook Central" that featured a hunt for ghosts on 5 other islands. It was discontinued when the island was released. (see related question)
She's in Wild West Island in the bar.
It is in Trade and Bargain Shop.
If you mean spook central, then that answer can be found in your items unde ghost story, in files that you will/have revcieve/received after talking to the ghost hunter. It's Skullduggery, Shrink Ray, Steamworks, Wild West, and 24 Carrot.
The ghost is by the school on Main Street. You can catch him by the right side of the banner announcing the Science Fair.
The ghost is on Main Street by the school. Catch him as he passes the right side of the Science Fair banner.
If you are talking about Spook Central, then all you have to do is go to the little green icon, talk to the girl and she will give you some ghost catching supplies. then go to the islands that the ghosts are on and touch them to catch them.
go to on mainstreet in shrink ray island walk to the school entrance and he will be right there
The ghost runs up past the tower and telescope, and down near the tavern (multiplayer room). You can jump and catch it there.
poptropica sucks get a life loser
It is on Main Street in Fort Ridley. You can see it if you climb to the roof, then capture when it comes down in front of the multiplayer room (tavern). Only paid monthly members could complete Spook Central.