Perform 2-UP in Yellow Switch

Activate Yellow Switch in Yellow Switch

Find secret room in Grass World 1-2 and finish the way

Find both secret rooms in Grass World 1-4 and finish both

Find secret room in Grass World 1-1 and finish the way

Complete Morton's Castle as Small Mario only (no checkpoint)

Find secret room in Cherry Forest 2-A and finish the way

Complete Beetle's Castle as Small Mario only (no checkpoint)

Find secret room in Spooky Land 3-2 and finish the way

Complete secret exit in Spooky Land 3-2 without activating the light

Activate Green Switch in Green Switch

Complete Tryclyde's Castle as Small Mario only (no checkpoint)

Find secret room in Xmas Field 4-1 and finish the way

Find secret room in Xmas Field 4-2 and finish the way

Find secret room in City Heights 4-5 and finish the way

Complete Clawgrip's Castle as Small Mario only (no checkpoint)

Find secret room in The Sewer 5-1 and finish the way

Complete Xmas Field 4-A as Small Mario only (no checkpoint)

Complete Lava Mountain 5-A as Small Mario only (no checkpoint)

Clear all exits

Complete Morton's Castle

Complete Beetle's Castle

Complete Tryclyde's Castle

Complete Clawgrip's Castle

Beat the game and complete credits directly