This article is under construction. Therefore, please excuse its informal appearance while it is being worked on. We hope to have it completed as soon as possible.
Template:Levelbox
Mystery House Marathon, or World 
Crown-
Mystery Box, is the final Mystery House of Super Mario 3D World, with each challenge lasting 10 seconds for a total of 300 seconds (five minutes). It is the longest course in the game, with thirty Green Stars to collect.
Challenges
- Green Star 1: A room containing three Koopa Troopas that must be defeated to collect the Green Star.
- Green Star 2: A set of three swinging platforms, and one rolling spike bar, the Green Star is at the end of the platforms.
- Green Star 3: A room with three P-Switches and two Brolders, all switches need to be activated.
- Green Star 4: A room containing four Torches and a Rectangular ? Block with a Fire Flower.
- Green Star 5: A room rotating counterclockwise containing three Peepas rotating clockwise and a Green Star.
- Green Star 6: A room containing twenty wooden Crates. The Green Star is in the top right group, bottom left crate.
- Green Star 7: A room containing a Goomba and six Micro Goombas who need to be defeated to collect the Green Star.
- Green Star 8: A room containing four Biddybuds and five Baseballs, the Green Star is over a gap down a slope.
- Green Star 9: A room containing four Hop-Chops and a out of reach Green Star.
- Green Star 10: A room containing two Thwomps and an invisible path.
- Green Star 11: A sled run with Walleyes.
- Green Star 12: A room separating a small P-Switch and the Green Star, with a long ? Block with a Super Bell.
- Green Star 13: A set of large blocks stacked up with the Green Star at the top.
- Green Star 14: A room containing one second Beat Blocks for stairs and a Green Star.
- Green Star 15: A room with four Donut Blocks, with the Green Star at top.
- Green Star 16: A room rotating counterclockwise with two groups of Fuzzies rotating clockwise. Green Star is in the middle of the wall in a top opened box.
- Green Star 17: A room with seven Boost Pads and a Rabbit holding the Green Star.
- Green Star 18: A room containing a Trampoline and five Baseballs, with a small P-Switch at the top on the right side wall that must be hit for the Green Star to appear.
- Green Star 19: A rotating wooden circle maze containing two Piranha Plants and a Green Star.
- Green Star 20: A platform and two Bullies.
- Green Star 21: A room containing three Extending ? Blocks and an out of reach Green Star.
- Green Star 22: A room containing three Boost Pads, two Bill Blasters, Cat Bullet Bills and a Green Star at the end of a narrow walkway.
- Green Star 23: A room containing six Piranha Creepers, five as stairs and one as an obstacle, with the Green Star at the top.
- Green Star 24: A room containing three P-Switches, two Thwomps, one Bomb and five Baseballs.
- Green Star 25: A room containing two Potted Piranha Plants and two groups of Fuzzies, who must be defeated to collect the Green Star.
- Green Star 26: An automatically rotating hill with Piranha Plants and Brick Blocks and a Green Star at the end.
- Green Star 27: A room with Gray Brick Blocks up against the wall, a Search Light and Bullet Bills. The Green Star is in top left corner.
- Green Star 28: A Donut Block Bridge with two Spikes at the end along with the Green Star.
- Green Star 29: A room containing Boom Boom, who can be defeated in one stomp.
- Green Star 30: A straight pathway with Coin Stacks, a stamp and a Green Star all laid out in a row.
Enemies
Stamp
- In the final room, in plain sight.