World 2 (Yoshi's Woolly World)
From the Super Mario Wiki, the Mario encyclopedia
World 2 is the second world in Yoshi's Woolly World and Poochy & Yoshi's Woolly World. It is a desert themed world. This world has nine levels: eight compulsory, and one optional special level unlocked after collecting all 40 Smiley Flowers for the world. Completing this world unlocks World 3.