https://youtu.be/Jxk9DqdYsJ4This theme gives me chills every time. Nearly 25 years later, and it still hasn't been topped. Not even close.
As soon as you hear the music stop and you hear those opening notes, you know shit just got real.
The HGSS version is good too, it has a really epic intro, but it loses a lot of energy after that.
https://youtu.be/SYTS2sJWcIsThe B2W2 version sounds better IMO, the more pronounced and upfront drums help to keep the energy high, but the GSC version will never ever be beaten.
https://youtu.be/5leGXLVWFrgI recommend listening to the Symphonic Evolutions version of this theme. When I heard it live I nearly cried.
https://youtu.be/8yTctwlsZ5w 