Track 01: Opening theme "Mezase Pokémon Master" (TV Size) [Aim to Be a Pokémon Master]
        Self-explanatory.
Track 02: Pokémon! Kimi ni kimeta! [Pokémon! I've Chosen You!]
        This played at the beginning of the first episode,
        "Pokemon! I've Chosen You!" and is a very common theme.
Track 03: Tabidachi [Setting Off]
        Another common theme, this played when
Track 04: Jitensha de Goo [Go With the Bicycle]
        This is obvious enough - when Satoshi-tachi
        are riding bicycles in the bike gang episode.
Track 05: Santo Annu-gou [The Ship St. Annu]
        Played when Satoshi-tachi were on the St. Annu,
        and also when they were attending the Evie
        evolution party.
Track 06: Pikachuu Toujou [Pikachu Arrives]
        This played when Satoshi first met Pikachu.
Track 07: Maboroshi no Pokémon [The Illusionary Pokémon]
        This didn't appear in the anime - it's strictly
        from a special called "Mewtwo's Birth", wherein 
        Mew appeared. I know nothing about it.
Track 08: Pokémon! GETTO daze! [I Got a Pokémon!]
        This played when Satoshi caught his first Pokémon,
        a Caterpy, and also when Pikachu defeated Raichu.
Track 09: Pokémon Holiday
        This played when Yuki was massaging that Lucky,
        and also when Satoshi-tachi visited the Pokémon
        Center wherein they received an electronic card
        from Dr. Ohkido.
Track 10: Osorubeshi Koduck [Koduck gets his own BGM!?]
        This plays when Koduck battles the bike gang
        girl's Parshen...and loses miserably.
Track 11: Pokémon League Kounin Cap [The Pokémon League Official Cap]
        A bit outlandish, that Satoshi's HAT gets its own
        theme, deshou? Nonetheless, here it is. Plays when
        it's discovered that Satoshi's ordinary-looking hat
        is actually an official Pokémon League cap.
Track 12: Masaki no Toudai [Masaki's Lighthouse]
        This played in the episode "Masaki's Lighthouse" (Lighthouse on the Hill),
        wherein Masaki and Satoshi-tachi were waiting for Kairyuu to appear.
        It also played when Natsume's doll appeared before Satoshi-tachi, and
        personally, I always associate this with her rather than with Masaki.
Track 13: Den Setsu [Leg End]
        Hmm... I don't exactly remember when this played. It's pretty, though.
Track 14: Rocket-dan Boss no Theme [The Rocket Gang Boss' Theme]
        Another self-explanatory theme. Played when Sakaki-san
        first appeared in the episode "The St. Annu Battle".
Track 15: Rocket-dan Onmitsu Sakusen [Rocket Gang Secret Strategy]
        Plays when Musashi-tachi are Up To No Good. A neat little
        jazzy saxophone theme.
Track 16: Rocket-dan Shichi Henge [Rocket Gang Seventh Change]
        Ooooohhhohohohohoho... ho.... ho.......
        This is that peppy, cute theme that plays when something
        weird happens. One of my favorite pieces.
Track 17: Nandakanda to Kikaretara... [Whatever It Is You Want to Tell Us...]
        The Rocket Gang speech theme. Love this one.
Track 18: Kyouteki Arawaru [A Formidable Enemy Appears]
        Played when Dokukurage and its follower Menokurages were
        wrecked Aolpulco.
Track 19: Shuugeki! [Raid!]
        Plays when Bad Stuph happens. The one that springs to mind
        the most is in the first episode, when Onisuzume calls for
        reinforcements and Satoshi and Pikachu are forced to retreat.
Track 20: Nigero ya Nigero! [Let's Run, Run, RUN!!]
        The most memorable scene when this played, in my opinion,
        is when Musashi and Kojirou are on the island of the giant
        Pokémon and are fleeing a giant Kabutops. They jump into
        a train thingie, which heads back the way they came, and,
        well.... "YANA KANJIIIIIIIII!!!!!"
Track 21: Daikonsen [A Huge Free-For-All]
        You know, there are so many conflicting images in this
        stupid book that I can't remember what plays where anymore.
Track 22: Pokémon Battle!
        The battle theme that plays when Pikachu battles Raichu the
        second time around, and wins.
Track 23: Shakunetsu no Battle Field [Burning Battle Field]
        One of my favorite battle themes <3 This plays in "The
        St. Annu Battle", when Satoshi-tachi beat the living
        daylights out of all those black-clothed Rockets.
Track 24: Yatta ze! [I Did It!]
Track 25: Tsuki no Ishi [The Moon Stone]
Track 26: Inori [Prayer]
Track 27: Saikai [Reunion]
Track 28: O-den [Hodgepodge]
Track 29: Charinko Bousouzoku [Charinko Delinquents Club]
Track 30: Toushi [Fighting Spirit]
Track 31: Genwaku no Bijo [Dazzlingly Beautiful Girl]
Track 32: Shinobiyoru Kage [Creeping Shadow]
Track 33: Zettai Zetsumei [Absolute Death]
Track 34: Kyouaku Pokémon Shutsugen! [A Brutal Pokémon Arrival!]
Track 35: Souryokusen [Total War]
Track 36: Fukutsu no Pokémon [Persistant Pokémon]
Track 37: Ikken Rakuchaku [One Item Being Settled]
Track 38: Namida, Nochi Hare [Tears, After the Clear Weather]
Track 39: Deai to Wakare to [A Meeting and a Parting]
Track 40: Shouri no Badge, GETTO da ze! [I Got a Victory Badge!]
Track 41: Tsudzukuttara, Tzudzuku [It Was Continued, To Be Continued]