Super Mario Maker's corporate tie-ins continue with a new course designed by price-conscious airline Southwest — and it's apparently the only way to unlock the Super Mario Land-themed Sky Pop costume.

A new level titled "Southwest Air Adventure" for the Wii U game is now available in Super Mario Maker's Event Courses. Find the Mystery Mushroom in the Southwest-created level — which is replete with the airline's heart-shaped logo — and complete the level and players will be able to use the Sky Pop costume in other levels.

You can see a bit of Sky Pop in action in the Japanese trailer above.