Core

Core is a Mars Djinni found in Golden Sun: The Lost Age, and is numerically the fourteenth Mars Djinni found overall and the seventh found in The Lost Age.

Location
Core is found by random encounter in the overworld region of Atteka in a region of land southwest of Jupiter Lighthouse that is separated by a river, where Core then must be battled to be acquired.

Description
When Set, it increases base HP by 8, base Attack by 4, and base Defense by 2.

When used, Core assumes the form of a three-dimensional sphere of fire and crashes through the enemy target, attacking the target with 40 additional attack points converted to Mars damage and lowering the target's defense down to 50%.

Name Origin
Core's name most likely refers to the Earth's core, which is easily the hottest place on (or in this case "in") Earth.