Pearl Bean
From the Super Mario Wiki
The Pearl Beans are two differently-colored pearls with small beanstalks growing out of them. In Mario & Luigi: Superstar Saga, the brothers must find these two items by using the Firebrand and the Thunderhand techniques. They must be given to the Jellyfish Sisters. After given to the Jellyfish Sisters, Mario and Luigi gain the Fire Bros. and Thunder Bros. moves.
