The Yellow Pure Heart is the third Pure Heart given to Mario on his journey. Merlee gave it to Mario, Peach, Tippi, Thoreau, Boomer and Slim after beating Mimi, Merlee's maid and a minion of Count Bleck. When it is placed in its Heart Pillar in Flipside Outskirts, a yellow door that leads to the Bitlands will appear on Flipside Tower.