And here are all the Movie 8's tracks:
http://www.pocketmonsters.net/episodes/577#Music. It's weird that the track "Aaron's Theme ~ Farewell Lucario" was included in the CD but wasn't used in the movie.
- The music at 01:51 seems to be a different version of "Regirock".
- The cue at 1:03:26 seems to be a different version of "Regirock" too.
- The track at 1:06:00 (that plays again at 1:10:07) is yet another version of "Regirock". It's especially noticeable after the first 20 seconds.
- The music at 25:17 seems to be a different version of "Kid (Suspense)".
- The BGM that plays at 31:46 plays again at 47:09 and 48:47.