Proceeding quickly with DP's 47th and 48th episodes.
Unlike AG's recap, there was clear effort put in this one, as the scenes included the original recordings and sound effects without the original BGM, and different music was inserted as needed to fit the situations that were being recapped. The anime producers obviously learned from the first experience and showed foresight to use/save a copy of the unmixed versions of the episodes.

http://www.pocketmonsters.net/episodes/540#Music
http://www.pocketmonsters.net/episodes/541#Music

Possible unreleased music:
DP 48 - Hikari meets Nozomi. (This looks to be Movie 9 BGM, but can't find it anywhere on the CD's soundtrack or even in the unreleased tracks. The beginning is similar to "Carnival of the People of the Water", but it still is a little different, and can't find the part that follows. It's possible that it was an unused and unreleased track composed by Shinji Miyazaki for the movie, as I know there's at least one such track, like the variation of "Depart! Towards a Voyage!". But look carefully, so maybe you can find it. Otherwise it really is an unused piece from Movie 9.) - Plays after "Movie 2 BGM - Fire Orb".

I have to agree with you on this one that its completely unreleased/unused movie 9 music. While it sounds like a couple of the Manaphy tracks, nothing seems to completely match in the unreleased tracks or the cd release tracks. I have therefore added it as 'Movie 9 BGM - Unused Piece'.

Third day in a row assigning the BGM! This must be my biggest achievement in a while :P DP's 49th and 50th episodes.

http://www.pocketmonsters.net/episodes/542#Music
http://www.pocketmonsters.net/episodes/543#Music

Finishing the Tag Battle Tournament and 10th dub season with DP's 51st and 52nd episodes.

http://www.pocketmonsters.net/episodes/544#Music
http://www.pocketmonsters.net/episodes/545#Music

Fixed up this track after a bit of research by ivan and it is now still an unreleased track but my initial track indexing of Movie 9 accidentally mixed up a track sample making this specific track hard to identify in the DP clip show. It has since been corrected and the track is now called "Movie 9 BGM - Pikachu Returns with the Egg"

Entering into the 11th Season's territory: DP's 53rd and 54th episodes.

http://www.pocketmonsters.net/episodes/546#Music
http://www.pocketmonsters.net/episodes/547#Music

You know... two more.

http://www.pocketmonsters.net/episodes/548#Music
http://www.pocketmonsters.net/episodes/549#Music

Blah blah blah I just got two more finished.

http://www.pocketmonsters.net/episodes/550#Music
http://www.pocketmonsters.net/episodes/551#Music

Now the music in DP is fully indexed up to the 60th episode.

http://www.pocketmonsters.net/episodes/552#Music
http://www.pocketmonsters.net/episodes/553#Music

I think other than Shinji Miyazaki himself, you're probably one of the most knowledgeable people of Pokemon music in the world now lol!