Collect all 7 stars in Goomba Valley.

Collect all 7 stars in Poisoned Winter.

Collect all 7 stars in Bitter Badlands.

Collect all 7 stars in Strange Sewers.

Collect all 7 stars in Ampersand Furnace.

Make it to Peach's Castle after the final boss. To be continued in Ztar Attack!

Press the wing, ice, and vanish cap switches.

Lock yourself inside of one of the jail cells in the starting area (hacktice allowed, see comment).

In Lava Wasteland, let the music fully loop for some funny text to briefly appear.

In Course 1 (mission 4, 5, or 6), collect the star 'At the End of the Lava Source' without taking damage.

In Course 2, collect the star 'Check the Ice Cap' without getting an ice cap.

In Course 3, boil all eight bullies (requires ice cap, bullies boiling themselves count).

Collect 200 coins in Strange Sewers.

In Course 5, collect the star 'It Is About Burning' without going below half HP.

Collect 104 coins in the Lava Wasteland.

In Ranbow Heavens, collect the red coin star without the red coin radar (turn off radar within 1 sec of entering).

Collect the red coin star in Tropical Resort without taking damage.

Defeat King Bob-omb without pressing the A button during the fight.

Defeat the big Mr. I and collect its star.

Defeat the big bully and collect its star.

Complete the Speedy Trials Challenge with at least one minute remaining.

Complete the Scary Secret Slide in under 22 seconds.

Beat the game in under 30 minutes (reloading allowed, see RP for time).

Beat the game with all 50 stars in under 1 hour 15 minutes (reloading allowed, see RP for time).

Collect all 50 stars in the jail.

Collect the runaway star in the jail without taking damage.

Collect the star that's actually a key in the Speedy Trials Challenge.