World 6-Rainbow

To access this level, the timer must end with the two digits '66' (that is, 'x66', where 'x' can be any number) when the player reaches the flagpole of any World 6 level(not Fortesses or Castles). Once the level is completed, it can be accessed again by satisfying the above condition once more.

In this level, Mario or Luigi has to bounce on pink mushrooms to collect spinning circles made out of coins. There's a Red Ring in this level: if the player collects all 8 red coins, they'll receive a Gold Flower in their item storage.