Collect 2 Power Stars. That's enough to head into the Ancient Lighttower.

Collect 6 Power Stars. That's enough to head into the Ghost Water Palace or Cursed Pyramid.

Collect 12 Power Stars. That's enough to head into the Entangled Dungeon or the Firemouth Grounds.

Collect 19 Power Stars. That's enough to head into the Sub-Zero Stronghold.

Collect all 25 stars. That's enough to unlock...uhh...nothing.

Beat Metal Mole in the Ancient Lighttower.

Beat the Mummy Pokey in the Cursed Pyramid.

Beat the Big Boo in the Ghost Water Palace.

Beat the Deku Scrub in the Entangled Dungeon.

Beat Flaplips in the Firemouth Grounds.

Beat Squatcha in the Sub-Zero Stronghold.

Collect the 6 tokens from the Power Realms.

Beat Bowser at his own game and save the Mushroom Kingdom.

From the first key you collect, reach the boss of Ancient Lighttower without dying.

From the first key you collect, reach the boss of Cursed Pyramid without dying.

From the first key you collect, reach the boss of Ghost Water Palace without dying.

From the first key you collect, reach the boss of Entangled Dungeon without dying.

From the first key you collect, reach the boss of Firemouth Grounds without dying.

From the first key you collect, reach the boss of Sub-Zero Stronghold without dying.

From the first key you collect, complete Bowser's Castle without dying.

Find the hidden 3-up moon in the Ancient Lighttower.

Find the hidden 3-up moon in Snowflake Summit.

Find the hidden 3-up moon in Sub-Zero Stronghold.

Complete the Light Realm Time Trial with at least 15 seconds remaining.

Complete the Sand Realm Time Trial with at least 10 seconds remaining.

Complete the Ghost Water Realm Time Trial with at least 15 seconds remaining.

Complete the Plant Realm Time Trial with at least 15 seconds remaining.

Complete the Fire Realm Time Trial with at least 8 seconds remaining.

Complete the Frozen Realm Time Trial with at least 15 seconds remaining.

Clear all 6 Power Realm time trials.

Find all 4 of Captain Toad's secret invincibility stars.