From the Super Mario Wiki
When the player decides to stop here, he or she will meet Mr. E, looking for Bigfoot, but mistakes a snow-caped Bowser and Koopa Kid for it, and scrams. Their quest, Chillin' Villain, involves Bowser asking three questions to the player, and they must come up with really good joke for each one. After that, he'll challenge them to the Bowser minigame Crushed Ice. If the player succeeds at defeating the set number of Koopa Kids, Bowser will reward them with the Gaddget, Breeze Buddy.