God that MH music gets my heart racing... Mostly because in that game every time you hear new music you're in for a hell of a fight with a creature you've never gone up against. So good.
I've always thought Pokemon music is always great at capturing a mood. It usually heightens the feelings of that part of the game without being obtrusive. Here's a few of my favourites (linked to avoid breaking the thread):
Pokemon Diamond & Pearl (2006)
Route 201 Theme - A relaxing a nostalgic tune to kick off a new journey
Uxie/Mesprit/Azelf - A fast-paced exciting theme for fighting the powerful legends of human virtue
Pokemon Heart Gold & Soul Silver (2009)
Dark Cave - A blindingly dark cavern with a mysterious theme that tells you that just about anything could be lurking here
Pokemon Black/White/Black2/White2(2010-2012)
Unwavering Emotions - A tune that occurs many times throughout these games to signify a particularly emotional moment. So serene and sad. A beautiful tune.
Pokemon X & Y (2013)
Snowbelle City - A calm, frosty tune for a calm, frosty place. Reminds me of something from Xenoblade. Which I'll do later if nobody else does.
Kanto Legend Battle - Such an exciting track. You've found one of the legendary Pokemon from the very first Pokemon games. The song opens up with some hype electronic music, then drums and bass when suddenly the 8-bit theme from the original Red/Blue games starts to float in and out of the song. Gave me chills the first time.
Pokemon Omega Ruby & Alpha Sapphire (2015)
Mt Pyre Peak Theme - An exciting and yet spooky tune to accompany having trekked through a hollowed-out mountain filled with the graves of deceased Pokemon, to reach peak where the region's most revered artifacts lie.
Wally's Final Theme - The stage is set, you've nearly made it every trainer's final destination - the Pokemon league - but one final challenge stands in your way. Your weak rival has finally become a Pokemon master. Cue the electric guitar.