Bean Fever

"Hmmm... Green hue... Yes... Discoloration in the face... The symptoms seem to indicate... Bean Fever! No mistaking it!"

- Toad doctor

Bean Fever is a condition endemic to the Beanbean Kingdom, only encountered in Mario & Luigi: Superstar Saga and its remake, Mario & Luigi: Superstar Saga + Bowser's Minions. It causes whoever contracts it to gradually turn into a Bean over the course of three days, although it is not explicitly clarified if they turn into a Beanish Resident or a literal bean. Bean Fever can only be contracted by foreigners. A known cure to the disease is Crabbie Grass, which can be located in the Guffawha Ruins.

Mario acquires this disease while in Little Fungitown after consuming a mushroom (Invincishroom in the original, Poison Mushroom mistaken for an Invincibility Mushroom in the remake) won at the town's arcade. He is diagnosed by a Toad doctor who informs Luigi of how to cure Mario. Scared at the prospect of venturing in the Guffawha Ruins, Psycho Kamek (replaced by Dr. Toadley in the remake) hypnotizes Luigi into believing he is Mario so he gains bravery to retrieve the Crabbie Grass from the Guffawha Ruins. Mario's bedridden Bean Fever state and Luigi's absence allows Cackletta (now revived as Bowletta after possessing Bowser) to abduct Princess Peach to restart her evil plans.

In Mario & Luigi: Superstar Saga + Bowser's Minions, the disease now reduces Mario's HP to 1 and his BP to 0.

Names in other languages
Febbre Fagiolina