If a Baby Yoshi finds a White Shy Guy, the White Shy Guy will follow behind the Yoshi like a Yoshi Egg, copying the Yoshi's movements until the stage is completed. After the stage is completed with the White Shy Guy still with the Yoshis, the White Shy Guy can then be selected on the screen. If selected, the White Shy Guy will equip a rocket backpack and fly over to Baby Bowser's Castle to rescue one random Yoshi. White Shy Guys are usually hidden well inside ? Bubbles or ? Blocks.