Fugue

Fugue is a Mars Djinni found in Golden Sun: The Lost Age, and is numerically the eighteenth, and final, Mars Djinn found overall and the eleventh found in The Lost Age.

Location
It is found in Mars Lighthouse, where it must be battled in order to be acquired.

Description
When Set, it increases base HP by 11, base PP by 4, and base Defense by 2.

When used, Fugue lowers the PP values of all enemies with an array of large musical notes.

Analysis
In almost all cases it's better to simply lower an enemy's HP than their PP, especially since the tougher bosses in the game have inherent PP regeneration.

Name Origin
In music, a fugue is a type of contrapuntal composition or technique of composition for a fixed number of parts, normally referred to as "voices". This is why the this Djinni lets loose musical notes.