Chaos Hound

The Chaos Hound is a boss fought at the end of Golden Sun: Dark Dawn. It is a twisted, burly werewolf-like creature that Blados and Chalis control like a pet, and all three fight the party in the first of the two final boss battles.

After either the Chaos Hound or both Blados and Chalis are defeated, Blados and Chalis use their Dark Psynergy to empower the Chaos Hound, which causes it to grow in size and absorb the duo's bodies, creating a multi-armed monstrosity. After the party defeats it, Sveta discovers that it is the twisted body of her brother, Volechek, who Tuaparang captured and "improved" after Volechek turned against them at the start of the Grave Eclipse. Being a creature of darkness now, Volechek will not be able to exist in the normal light-filled world, but he is able to survive long enough in the dangerous amounts of light permeating Apollo Lens in order to turn it on and end the Grave Eclipse.

As a Boss
The Chaos Hound appears in the first half of the final boss battle. He possesses around 3374 HP, and is weak against Venus-aligned attacks. The nature of the first battle is such that the player can not defeat all three enemies. Instead the battle will automatically end once the player defeats the Chaos Hound, or the team of Blados and Chalis. The following cutscene will play out slightly different depending on which enemies are defeated. However, the cutscene will always lead into the second half of the final battle, against the Chaos Chimera.

Moves

 * Attack
 * Dark Blow: Single target. Medium-High damage.
 * Deadly Gas: Inflict Venom on up to 3 targets.

Strategy
Given that the final battle is essentially two battles in one, focusing damage on the Chaos Hound may help to end the battle more quickly, thereby saving your Adepts for the much more difficult battle against the Chaos Chimera. Also it is easier to take advantage of elemental weaknesses, as Blados and Chalis each possess weaknesses to different elements. Attacking the Chaos Hound with Venus-aligned summons and attacks will help to make short work of the beast. It is also useful to have an Adept on hand who can either use Cure Poison or possesses Antidotes, given Deadly Gas's ability to inflict Venom.

Once the battle has ended, the player will have an opportunity to heal and/or rearrange their party for the final part of the battle.