Answer:
There is currently no way to play Toontown directly on Linux. The game is only developed for Windows and Mac OS X, and the game does not function using Wine. If you want to play it on Linux, you will have to run Windows in a virtual machine, such as VirtualBox.
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Actually now toontown can be made to work on wine,
http://appdb.winehq.org/objectManager.php?sClass=version&iId=5393
its not a completely straight forward install but it is possible to work now.