From the person's video, From Frontier music to Jotho Music, the person only press the calculator once. From Jotho Battle Music to the Unknown Battle Music, that person didn't press the calculator at all.
This led me to wonder, if there is un-used tracks in Platinum, it would have been discovered long ago by the talented reverse engineers here.
Still kind of illogical. The Jotho battle track is very similar to the classic Silver/Gold and not the remake HeartGold/Soul Silver.
The new music seems to mix Kanto wild battle with R/S/E rival battle. I suspect he might be using the hack version of platinum.
BTW, this AR code seems to be similar to SQL injection when u enter the numbers in the calculator.