I think I have something. I remember one time I had a link cable battle (3rd gen emerald) against friend many years ago when I first started playing pokemon. Instead of the normal battle music, it played the champion music. I know there are a lot of other priorities (I don't expect this to happen or at least any time soon since there are a lot more important things like doubles and triples), but it would be pretty cool if 2 people in the top 100 (or something like that) battled and it played the champion music instead of normal/rival battle music.
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