Rainbow Course

A Rainbow World is a special course found in New Super Mario Bros. 2. It can be triggered by finishing a level with the last two digits of the Time Limit being "11", which is followed by the original Super Mario Bros. "Course Clear" theme playing, along with a firework going off and a rainbow appearing. Then, Mario can then head to the beginning of the world, where a Rainbow World course has opened up. At the beginning of every Rainbow World, Mario must enter a Cannon Pipe to be launched into a Coin Heaven-type area with, of course, lots of coins, 10 Gold Coins, and even a single 100 Gold Coin. However, all Rainbow Worlds are slightly different from each other. If Mario falls off the course, he will not lose a life, but it will close up and Mario must redo the method of unlocking the Rainbow Course in order to access it again.

Trivia

 * The music is a sparkly remix of the New Super Mario Bros. Wii Coin Heaven theme.