Gaming [Spoilers] 2 Battle themes?

[xtheman]

So I converted to the soundtrack of moon to .mp3 and looked for the song for when you battle Hua.
I naturally clicked vs_rival. But a different battle theme came up. So I tried vs_friend and sure enough it was his theme.

So I want to know why 2 battle themes? Or is he not the true rival like May/Brendan in oras?

 

[Simon Blackquill]

Gladion is also a rival maybe the first is his.