Haunted House - video game - happened in 2600.
Haunted House - video game - was created in 1982.
Haunted House - arcade game - was created in 1972.
there is no haunted house island
There is no cheese in the Haunted House game. (see the related question)
It lets you play the Haunted House mini-game. (a Halloween game from 2009). You can use the card to enter, then leave the Haunted House game, if you have a glitch that keeps you from moving, or when you have completed an island. The card exits to the Island Map, not where you were when you used it.
no way
you
Apparently "Raven Hall, the most haunted house in Australia" was simply a fictional place used by the "Camp Orange" kids TV show for their 4th Season (2008), which was entitled "The Curse of the Emerald Eye". (The 4th season is airing in the US in the summer of 2010.)
Selecting the Haunted House card from the store places it in your Store items. Completing the game gives you 50 credits. There is no Medallion.
To leave the house, get the four treasures, fuel the lantern with kerosene, and talk to the ghost cat. The cat will tell you where to take the treasures. To get out of the Haunted House game, you go into the opened grave at the far right, the one that you entered the game through.
There are no cheats to any of the games or islands, as the game is played on Poptropica's servers. You cannot alter the game play by any input or shortcut. (For the solution to the Haunted House, see the related question.)