Yoshi's story

Baby Bowser casts a spell on Yoshi's Island that turns the island into a storybook. The Super Happy Tree, the "elixir of life" for the Yoshis, was also stolen. Lucky for the Yoshi's six Yoshis survived the spell. The Yoshis were confused, as the island was gloomy instead of happy. They decided that if they were all Super Happy, they would defeat Baby Bowser and save the island and the Super Happy Tree.