World 9 (Superstar Road)
Successfully the complete the game with all Star Coins from Worlds 1 through 8 collected.
Saved game file star icons
Complete the indicated task to add the corresponding star to your saved game file.
Star 1: Defeat the final Boss of the main game.
Star 2: Collect all Star Coins from Worlds 1 through 8.
Star 3: Complete all levels, find all 94 exits in Worlds 1 through 8, and enter the purple Toad mushroom house.
Star 4: Collect all Star Coins in Superstar Road.
Star 5: Catch Nabbit in Worlds 1 through 7.
End of level fireworks and items
Get the flagpole with the last two digits of your time being the same number. The number of fireworks that will appear depend on which number was the same. For example, "11" will result in a single firework, while "22" will show two fireworks, etc. Additionally, certain numbers will also give you a bonus item, as follows.
Fire Flower: 33 or 44
Ice Flower: 55
Star: 88 or 99
Super Acorn: 77
Super Mushroom: 11 or 22
Tiny Mushroom: 66
Save anytime at Overworld map
Successfully complete Story mode. The "Quick Save" option will change to the "Save" option at the Overworld map menu.
Visit Toad Houses repeatedly
Unlock all five stars on your saved game file. You can now visit Toad Houses as many times as desired, and previously inactive Toad Houses can be visited again.
Propeller hat and Penguin suit power-ups
Unlock Superstar Road. Go to the Toad Houses there to find the Propeller Hat and Penguin Suit power-ups.
Successfully complete the game to enter the purple mushroom house in Sparkling Waters. Once there you can review your records, such as stages cleared, Goombas stomped, etc.
Ghost House: Exit to World 3 Sparkling Waters secret level
Proceed through most of the Ghost House level towards the normal exit. Get to the room that is almost completely made of false walls, near Star Coin #3. Go to about the middle of the room and find the Boo near a signpost and coins above you. The path to the secret exit is slightly in the air and to the left. Use wall jumps or the Squirrel suit to reach the secret door up there. It will open to a room with lots of coins and a red pipe that leads to the secret flagpole.
Tilted Tunnel: Exit to Acorn Plains secret level
Play World 1-2, "Tilted Tunnel". There is a secret exit at the end of the level. Reach the part with the red coin ring on a slanted purple crystal. Jump up and over the red ring to find a hidden passage containing some normal coins. Once inside that passage, jump up at the top of the first hill to find another hidden passage made of square bricks. Follow this passage to find a hidden pipe. Exit the pipe to find the red flag for the secret exit to Acorn Plains.
Tower: Exit to Rock Candy Mines secret level
Play through the Tower level. Either get the Mini Mushroom found early in the level or enter the level with one. Remain as Mini Mario all the way to nearly the top of the tower. Enter the miniature pipe up there and carefully proceed through the room. You will find Star Coin #3 and a pipe leading to the secret exit.
Very small Boost mode boxes
The Boost mode blocks shrink when you have 99 lives. Lose a life and they will return to normal size.