SUPER Master Quest is a mode unlocked on the Legend of Zelda: Ocarina of Time 3D. You unlock it after beating Master's Quest on two file slots, the first one named Link and the second named Mario. Just like Master's Quest, it adds a lot of additional challenge and stuff. This time, it turns the game uʍop ǝpısdn! It also adds two new bosses: Zelda and E.T.! It even changes the main plot of the game!
The Deku Tree catches on fire and burns down the forest, so all the Kokiri go to live in Hyrule, where they can't survive. Zelda gets infected by an Evil version of the Fairy Boe, by Ganondorf, so she turns evil! Then Young Link must stop her, so he does. He comes back at night time after defeating her to find that the Kokiri have been killed by Stalchilds!
Since the game is upside down, you only have to turn the 3DS upside down to correctly see the game.