Completionist

Clear World Mushroom

The special world reached through World 1's Warp Cannon.

Clear World Flower

Reached through World Mushroom's cannon or World 3's.

Clear World Star

Opens after the credits once you hold 90 Star Coins.

Collect every Star Coin in Worlds 1–6, Mushroom and Flower

The save file's second star.

Collect every Moon Coin in World Star

The third star.

Open every path on every map

The fourth star: every normal and secret exit, Star Coin sign and Warp Cannon. Toad Houses don't count.

Reach 1,110 lives

The fifth star.

Keep your stars sparklingmissable

Finish everything above without ever using an Assist Block on the file. One use dulls the stars for good.

Find your first Rainbow Course

Finish a level with the timer ending on that world's matching digits (11 in World 1, 22 in World 2, and so on).

Clear a Coin Rush run

Three random courses on one life. Opens after World 1's castle.

Collect 1,000,000 coins

Shared across all three files; the title screen gains a Gold Mario statue. No x/1,000,000 on screen, so a checkbox.