This is called the Green Demon Challenge!
The name refers to something that is typically considered a boon in Mario games: the 1-up mushroom. Basically, you find and activate a 1-up mushroom but don't grab it. You try to collect all eight red coins in a level, as well as the star, without letting a 1-up mushroom catch up to you.
Saw this on Serebii... it is unconfirmed, and I hope it stays that way.
Pokémon GO just dropped in Japan, and it doesn't get much more creative, in terms of trying to level up quickly as possible, than this!
In celebration of the Japanese Hanabi festival, Nintendo sent out the following piece of artwork to Club Nintendo members. Notice that it features our hero Link wearing Majora's Mask. OMG MAJORA'S MASK CONFURRMED!!1!
Also, this needs more scary moon action.
