We always knew something was up with Mario's hat in Odyssey – it looks downright sentient, and it’s all over the marketing to boot. But today’s new gameplay video from Nintendo’s E3 showcase revealed its full capabilities. Its power is frightful. It also has a name: Cappy.Cappy appears to be the ur-Super Mario-power-up. If the trailer is to be believed, Mario can hurl Cappy at pretty much anything in the world and become it. With a mustache. You see him morph into a Bullet Bill, into one of those malicious spark creatures, into a frog, into a taxi cab, into a tyrannosaurus rex, and into a human inhabitant of New Donk City – which once again raises the question: if Mario is not human, then what is he?There other hats in the world, too. When he’s what we're currently calling Mexico World (Chevy's World?), he wears a sombrero. [Update: We've since learned this location is called Tostarena Town.] We also see him wearing what at first appears to be Bowser’s white top hat, but which is actually Cappy in his natural form. Also, Bowser appears to be forcing Peach into marriage in Super Mario Odyssey. Wow.We'll have more on Super Mario Odyssey from E3 in the days ahead.