Golden Plains, exclusive to the 3DS version of the game, is a new stage that is based off of New Super Mario Bros. 2. The stage is one that has multiple sections, with it scrolling to the next part after a few minutes. The first section has flat portions with no pit (can KO off the sides), with the central portion being raised higher than the outside. There are also two moving platforms in this section, one that moves horizontally and one vertically.
The second section of the stage is a little more dangerous, as there is plenty of spots to fall in a pit and get KO'ed. There are two "mushroom" platforms, as well as two more suspended in the air. In between those is a set of platforms on a pulley, with one side sinking when standing on it and the other side rising.
The main gimmick, however, for this stage involves all of the coins found in the air. Should a character collect a total of 100 coins during the fight, they will turn into a gold version of themselves. This will increase their attack power, as well as make it so they don't flinch when attacked themselves; this effect lasts around 10 seconds. Coins collected persist through KOs, although the counter resets when you have collected 100 already.
