AG's 119th to 121th episodes, including the first clip show of the series. Oooh, that last one was pretty hard to do, due to the messy nature of the BGM of the recap episode. Basically, they would play clips from the previous episodes in their final state, meaning with the BGM they had playing originally and often add music at the same time as the original BGM, only inserting it in the moments where there was silence and in moments where there was really playing the original BGM and it was replaced by another in the recap (muting the said scene). What a lazy recap that was. Details are in the last link below.
Thankfully, this is not the case for the DP recap episodes.

http://www.pocketmonsters.net/episodes/395#Music
http://www.pocketmonsters.net/episodes/396#Music
http://www.pocketmonsters.net/episodes/686#Music

The Houen's Grand Festival is done. Since it was aired entirely as part of a 2-hour special, there was only the opening in the first episode and the ending in the third one, with the only preview being aired at the end of the special, for the episode right after the GF.

http://www.pocketmonsters.net/episodes/397#Music
http://www.pocketmonsters.net/episodes/398#Music
http://www.pocketmonsters.net/episodes/399#Music

AG's 125th to 127th episodes.

http://www.pocketmonsters.net/episodes/400#Music
http://www.pocketmonsters.net/episodes/401#Music
http://www.pocketmonsters.net/episodes/402#Music

AG's 128th to 130th episodes. The Houen League progresses.

http://www.pocketmonsters.net/episodes/403#Music
http://www.pocketmonsters.net/episodes/404#Music
http://www.pocketmonsters.net/episodes/405#Music

AG's 131st, 132nd and 133rd episodes. How's that for a change :D

http://www.pocketmonsters.net/episodes/406#Music
http://www.pocketmonsters.net/episodes/407#Music
http://www.pocketmonsters.net/episodes/408#Music

The episodes 134, 135 and 136 of AG. And thus the Battle Frontier saga begins, along with its first opening's debut (so awesome).

http://www.pocketmonsters.net/episodes/409#Music
http://www.pocketmonsters.net/episodes/410#Music
http://www.pocketmonsters.net/episodes/411#Music

BOOM! Forum block breaker! Battle Frontier is definitely the most epic intro song for the series. My favorite that's for sure! Almost 3/4 the way through AG, you're definitely on a role!

These are the episodes 137, 138 and 139 of AG. Am I done yet with the choice of wording?

http://www.pocketmonsters.net/episodes/412#Music
http://www.pocketmonsters.net/episodes/413#Music
http://www.pocketmonsters.net/episodes/414#Music

The episode 138 seems to have a music (?) at 17:47 that isn't released.

I'm posting the BGM of the episodes 140-142.

http://www.pocketmonsters.net/episodes/415#Music
http://www.pocketmonsters.net/episodes/416#Music
http://www.pocketmonsters.net/episodes/417#Music

I nearly "found" an unreleased music, when I finally dug it up at the last minute from the database. There was also a variation of an ending released on a different CD than the one that was put in its original CD. God, the number of tracks is getting overwhelming!

It's definitely getting harder to keep track of the music the farther we go into the series as it has a larger pool of music for them to choose from unlike the original series that just had a small number of tracks that were constantly reused.