The battle-graphics are some of the most impressive I've seen in any 2D RPG. The backgrounds are huge and seem to envelop the characters rather than just appearing behind everything. The battle-effects are enough to make your jaw drop. Both polygon and particle-effects mix together in EVERY battle action to create some of the most gorgeous battle moments ever seen; from the simple 'attack slash' to the dizzying colors of the Djinn summons, Golden Sun's battles have it all. The only negative would have to be the slightly grainy appearance of your characters in battles.
The music in Golden Sun stands just as tall as it's graphics. Every song in the game is beautifully orchestrated. But, as always, one needs to have headphones to hear the music as it was truly meant to be heard. Camelot makes full use of the sound capabilities of the GBA. It comes quite close to rivaling the music of such series as Final Fantasy, Dragon Warrior, and Lufia. As for the sound effects, from the subtle falling of rain to your character's screaming in battles, Golden Sun delivers it all, flawlessly.