Mario & Luigi: Superstar Saga
Cheats/codes, passwords, tips & tricks

Back to basics
While on the overworld, press L and R simultaneously to change both brothers to normal jumping mode.

Coin jump
As mini-Mario, have Luigi do a High Jump. Make mini-Mario jump before Luigi lands on him, and you'll earn a Coin, at the expense of one of Luigi's Hit Points. This trick can be repeated until Luigi has only one HP left.