What's your favorite soundtrack in a Pokemon game?

I can't really decide on a game which has my favourite soundtrack, but rather each games has a few of my favourites in them. As well as the ones already mentioned, I have to throw the Regi's theme from R/S/E into the mix. Truly delightful, and they cap off the mystery and the journey to reach the pokemon perfectly.

My favorite was the Gen III sountrack, with Lavender Town Theme(the RGBY and FRLG Versions) the favorite song in the series, the close second being Red's theme.

The original Pokemon Mystery Dungeon's soundtrack probably moved me more than any other game's soundtrack. Aside from that, I tip my hat off to HgSs and its explosion of old songs, new songs, old remixes of new songs, and original songs. I think it's the biggest soundtrack I have with me right now. It helps that I liked many of the remixes of the Kanto themes to begin with.

My fave Pokemon game music would have to be from Black and White.

It has a nice mix of soothing and epic music.

These ones are among my faves:

I'd have to say that HG/SS, D/P/Pt and B/W are tied for 1st for me.
HG/SS because of the Suicune battle, the Champion battle, and the Groudon/Kyogre/Rayquaza battle.
D/P/Pt because of Cynthia's music (both before you battle her and in-battle).
B/W because of the Team Plasma battle theme.

It's between the music from RSE and the music from Black and White. Hoenn is my favorite mainly cause the music is so spectacular. Every route you go, you hear hundreds of blaring trumpets , pianos, and rolling drums.
And for Black and White, alot of it blew me away. It's just beautifully composed and just an awesome mix and I love how in some city the music has layers and extra instruments can be added on when talking to certain NPCs. My favorite in BW is Village Bridge because it always takes me away cause it's beautiful, plus I love how I can listen to something slightly different each time I go.

my top 3 are miror b battle theme , team plasma theme and Team Galactic theme

My vote would be Myster Dungeon Time/SpaceDarkness/Sky if I would count side games.

For the main series, I would probably go with B2/W2 although it has a lot of remixes of old B/W music. It's original music is fantastic, add to a already good soundtrack.

I also give a special mention to G/S/C, even if HG/SS ruined a lot of the soundtrack.

oh oh I know I know the pokemon R/BY Lavender town and pokemon G/S/C ruins of Alph

Ruby/Sapphire had one of my favorite game soundtracks ever. The music was catchy, especially in Slateport. I also like the Mystery Dungeon Red/Blue/Time/Darkness/Sky soundtrack.

RBGY, RSE & BW2 had the best soundtracks imo.

GSC was pretty nice too, DPPt was eh to me.

But, RBGY and RSE being the most memorable for me.

Hoenn and Sinnoh had some nice tracks but honestly Pokémon Silver to me had the best and most memorable tracks :)