Here are the songs that debuted in the anime series based on the Nintendo DS games, Pocket Monsters Diamond & Pearl.

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Opening Themes (OP)
Here are the Japanese openings for the third Pocket Monsters TV series.

Title	Description	Symbols
Together (Together)	The first OP.	-

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Ending Themes (ED)
Here are the Japanese endings for the third Pocket Monsters TV series.
 

Title	Description	Symbols
Kimi no Soba de ~Hikari no Teema~ (By Your Side ~Hikari's Theme~)	The first ED.	-
風のメッセージ (The Message of the Wind)	The second ED.	-

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Songs from the Movies
Here are the Japanese songs used in the various Pocket Monsters Diamond & Pearl theatrical movies.
 

Title	Description	Symbols
Together 2007 (Together 2007)	The opening theme to the first movie, Diamond & Pearl movie, Dialga vs. Palkia vs. Darkrai.	-
Be With You ~Itsumo Soba ni~ (I Will Be With You ~Where The Lost Ones Go~)	The ending theme to the first Diamond & Pearl movie, Dialga vs. Palkia vs. Darkrai.	-
Natsu Desu ka? (Is it Summer?)	The theme song to the 2007 Theatrical Edition Illustration Contest.	-
One (One)	The ending theme to the second Diamond & Pearl movie, Giratina and the Sky Bouquet, Shami.	-
このゆびとまれ (Follow Me)	The theme song to the 2008 Theatrical Edition Illustration Contest.	-