Bowser's Highway Showdown

Bowser's Highway Showdown, or World 1-Castle, is the first confrontation with Bowser. Ten Green Stars are needed to unlock this level. You have to kick his soccer ball bombs back at him. It's pretty straightforward.

GS 1: Collect all eight green coins for the star.

GS 2: On top of the alcove with the Stamp, claw the wheel five times as Cat Mario/Luigi/Peach/Toad/Rosalina, and climb up the tower to the Green Star.

GS 3: On the long pier, claw the Goomba Tower five times for the Green Star.

Stamp: To claim the stamp, which is Bowser, kick the bomb into the large gray blocks near the large Goomba Tower.