A lot... I've had 6 different towns, and I have two copies of the game. I started with a pastel town which I lost the cartridge to, so I remade the pastel town on a new cartridge, then I found my old cartridge so I restarted that one at turned it into a Halloween town which changed from a Halloween town to an OTGW town, then back to just Halloween, and now it's both. XD And then I got bored of my pastel town so I restarted it to do a farm town. And then I lost the cartridge to the farm town and I was just playing my halloween one. When the update came out i wanted to test to see if I wanted to update my Halloween town so I restarted my boyfriend's copy and was going to do a Black and White themed town, but I gave him it back once I found my copy with the farm town so he restarted it, and I restarted my farm town to do the OYC town which is a pastel/rainbow town. XD