http://www.youtube.com/watch?v=4RlX0rC6k7E

Would like to know where this song comes from.

Thanks.

It is stated in the beginning of the battle: "Battle Scene / Final Boss (Golden Sun)".

Here's a link to the song: http://www.youtube.com/watch?v=La9kD1163Ww

Can't seem to find the specific track from the vid I posted, but if it is from Golden Sun I will look harder.