The Person Controller

Fred and Ellie are twins. They like all the same things, especially video games, which they're very good at. They aren't that good, however, at much else — like, for example, dealing with the school bullies. Then, they meet the 'mystery man,' who sends them a video game controller, but it doesn't control any of their usual games. When the twins find out what it does control though, it seems like the answer to all their problems...