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An swf is a small flash file. It stands for Shockwave flash, and can be found in Club penguin. A few files have been deleted, this means that it will Not be on Club penguin again, but most are still fine. There are still some blogs with the problem. In swfs, no penguins appear , because it's just a local swf. You can see one here. The weird thing, is that they are nearly all in different languages from english these days. A penguins in swfs are Dark Black.