You blinked in amazement. The remote showed a holographic display of you and Peach! Could you... really bring fiction to reality? You slowly dragged the 'Body' option over and, sure enough, you would have Peach's body and she would have yours. You could swap more afterwards, so you figured this was a good enough test. "Confirm."
Immediately, you were caught off-guard by the feeling of a different body, the void between your legs, the strangely large eyes, the hair, and the weight on your chest. You were Peach, and Peach in the game was you. On your teenage instincts, you put your hands to your new chest, amazed. The grin returned to your face as you realized how you'd just brought something out of a video game and into reality. An entire body, even! But you felt like that could wait a moment. Bowser was making his move, and you wanted to try and see if Peach played any differently with a realistic teenage boy's body.
After a couple minutes of gameplay, almost nothing besides what you'd swapped seemed amiss. Peach still had all her attacks, summoning heart symbols, Toads and turnips while fighting Bowser, but her voice was deeper now. It felt odd to play as yourself in a video game, let alone with Princess Peach's cartoonishly pink dress and crown, but you paused the game and wondered... Peach's Smash model didn't have anything under her dress. Hell, her dress was probably part of the model. But now you had it in your clothes. You took a quick glance at your phone's turned-off screen and 'your' face had Peach's cartoon proportions, even in real life. But even if her more private details had never been created in the realm of fiction (er, officially, anyway - you knew what the Internet was like), Peach's nude body definitely seemed to exist under these clothes. That, and you wondered if you'd see polygons if you looked close enough, given you'd swapped with a digital 3D model... You went over to your wardrobe and looked at the mirror inside. You were gonna take off this shirt and take a closer look at her body. Closing your eyes, you pulled your shirt over your head, and opened them. What you saw amazed you.