World 3 (Yoshi's Island DS)
From the Super Mario Wiki
World 3 in Yoshi's Island DS is set in a tropical beach area, which later becomes a desert cavern. The two bosses of World 3 are Bessie Bass and Priscilla. The Yoshis meet Baby Wario in this world, who joins at the start of level 3-5 and accompanies them throughout the rest of the world. At the end of the world, Baby Wario leaves the party and joins a group of Bandits.