I won't post any vids or links (too lazy), but here's some good ones:
Mother 3's final battle. It's incredibly distorted, chaotic, and intense. The first time I heard it, I was put in a state of permanent suspense because I kept wanting it to establish some form of coherency but it never does.
Golden Sun: The Lost Age's final battle, especially the Brawl remix. Just a solid example of great composition.
Vs. Marx in Kirby Super Star Ultra drove me nuts after awhile because I was trying to figure out its time signature (3/8 with occasional 5/8 measures).








