DEF-Down

DEF-Down is a status ailment that mostly appears in the Mario & Luigi series. It is an abbreviation for "Defense-Down".

Mario & Luigi: Superstar Saga / Mario & Luigi: Superstar Saga + Bowser's Minions
In Mario & Luigi: Superstar Saga and Mario & Luigi: Superstar Saga + Bowser's Minions, enemies like Glurps have the ability to change Mario and Luigi's stats. If their defense power goes down, enemy attacks will do more damage. The ailment is indicated by a gray block with an arrow pointing down.

Luigi's Thunder Bros. attack can give this status to enemies.

Mario & Luigi: Partners in Time
DEF-Down is the same status ailment in Mario & Luigi: Partners in Time. Its indicator is a shrinking green circle around the afflicted. Ice Flowers can randomly inflict this status ailment on enemies.

Mario & Luigi: Bowser's Inside Story / Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey
DEF-Down makes another appearance in Mario & Luigi: Bowser's Inside Story and its remake, Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey. Green streaks flowing downward indicate the affected. Many enemies can inflict this status on one of the bros, mainly enemies with the power to electrocute the bros such as Kretin. The Falling Star and Softener Gloves (in the remake) can inflict this status on enemies.

Mario & Luigi: Dream Team
DEF-Down once again makes an appearance in Mario & Luigi: Dream Team, visually the same as Mario & Luigi: Bowser's Inside Story. Green streaks flowing downward and black flashing indicate the affected. Many enemies can inflict this status on one of the bros. This status can be inflicted on enemies using a Virus-Master badge combo, or a Risk-Bronze badge combo (though the latter is less likely to do so, and it can affect the brothers).

Mario & Luigi: Paper Jam
DEF-Down returns in Mario & Luigi: Paper Jam. By using a DEF-Down Battle Card, Mario, Luigi and Paper Mario can lower all enemies' defense.

Paper Mario: The Thousand-Year Door
The status ailment appears in Paper Mario: The Thousand-Year Door, where it is known as the "Soft" status. It is indicated by a gray diamond with an arrow pointing down. Softness lowers defense by 3 points, to a minimum of 0; softening an enemy with a defense boost replaces its effect with Soft's defense drop. The Soft status is induced by items such as a Mr. Softener or badge attacks such as the Soft Stomp.