I have no idea why you would want your iPhone to look like a computer mouse but if you do, there’s an app case for that. The Fake Mouse Silicone iPhone Case looks like a real mouse complete with fake scroll wheel on one side. But the other side just looks like a regular iPhone case:
I guess you could leave your phone on your desk at work without any of your co-workers walking off with it because they will think it’s a mouse? But maybe if that’s the type of people you work with you shouldn’t leave your valuables on the desk to begin with. Well it’s certainly not the worst case we’ve seen, but definitely a bit strange.