The first one was kept. With the title card, the only tracks that were kept. Your usual crappy TPCi episode.Yeah, I suppose whatever the dub does is harder to knock when the Japanese edit was surprisingly sparse on nostalgic tunes anyway.
There were about two noteworthy, the TR classic theme remix (which was in XY anyway) and the original Japanese title theme during the montage (which doesn't really have the same relevance in the English version anyway). What occurred with those two in the dub?
Mezase Pokémon Master was replaced by the usual dub stock music with no personality. Nothing remarkable about that scene. They should have used the instrumental of the Pokémon theme from Movie 20 but I guess that's too logical for TPCi.
A small arrangement of said theme was used during the Ash/Misty/Brock flashbacks. Nothing outstanding, but it was a nice touch.