Thunderhand

Thunderhand is a move used by Luigi during the events of Mario & Luigi: Superstar Saga. He is taught this by the Thunder God in the Thunder Palace. It is even further advanced after Gigi teaches him how to use it with Mario.

Thunderhand can power Lightning Orbs and defeat thunder-prone enemies. It was the only way to defeat the Pirahna Plants that cover the runway on the Beanbean International Airport. In battle it proves useful against certain enemies. You can also use Thunder Bros. after the Jellyfish Sisters teach you. After the advanced method is taught, Mario and Luigi can pass through spiked barrels and activate Boo Statues.