First, beat the game like always, then head to coin rush and pick Flower Pack, and then just keep trying to get 3-4, and by the time you got it you've already made cracks on your 3ds...[
]If you survived the wait, speed run the level and be sure to have a golden flower and the Tanookie Suit, put it on and speed run the level 'till you get to the secret area with the koopa. Now, here's the hard part, your gonna want to hit him at the 3rd brick from the front then jump at him near the side and hit him. This should send him near the vine. Instantly turn gold Mario and jump in the golden ring if ya want. Next, go on the vine and hit him, knocking him into the brick, get into position and keep hitting him on the vine. If so, you'll keep hitting him AND getting coins. When the times hits 40, start running, you might not get 2x, anyways, the next level get 2x, and then at the castle is same, now, you just gotta repeat.....GOOD LUCK! [You:
Wait, i need to repeat till i get 1 million?!]