Forget cardboard. Photoshop!!
Check the above orange icon; the perspective of the "fountains" or so, on the floor, is completely wrong. And if you look closely, the rocks, trees, the waterfall, and the factory hall look like a 3D-render, made with a 3D modeling program (3D Studio Max or something) "fake" in a way, not a photo. Same goes for the other "pictures". Some of them are clearly a render, pretty bad ones too. More evidence? Look closely at the first, and the third picture: the two girls wearing red jerseys, pointing upwards: they're exactly the same! Download some pokemon images, drag them into the image, blur them a bit - Done!
I can't read Japanese (who can???), but maybe it's a concept for an exhibition or such. People want sexy images for those kind of things. ^^