Pokemon Ruby/Sapphire/Emerald (counting them all together fuck it...also I may be very biased but I LOVE THIS OST)
- Opening
- Title Screen
- Route 123
- Littleroot Town (;-;)
- Professor Birch's Lab (I forgot how great this song was!!!)
- Wild Pokemon Battle (hell yeah)
- Route 101
- Oldale Town
- The Trainer encounter themes are all pretty great...
- Trainer Battle (!!!)
- Petalburg City
- Pokemart
- Route 104
- Petalburg Woods (okay this one isn't that good...maybe...)
- Team Magma/Aqua Battle
- Rustboro City 
- Trainer School (another great song I forgot existed...)
- Cross the Sea
- Dewford Town
- Gym
- Gym Leader (YESASSSHSHSHSHS)
- Slateport City
- Oceanic Museum (I love this song so much...)
- Route 110
- Trick Mansion (this one probably isn't good but it's pretty catchy idk...)
- Game Corner
- Bicycle
- Verdanturf Town (;-;)
- Route 113
- Fallarbor Town
- Mt. Chimney
- Route 111
- Surf
- Route 119 (one of my fav route themes!!!)
- Rival's Theme, specifically May's 
- Rival Battle
- Fortree City
- Route 120 (another route theme I love!)
- Lilycove City
- Art Museum
- Contest Theme 
- Abandoned Ship
- Mt. Pyre Outside (super underrated song)
- Team Magma/Aqua Hideout
- Maxie/Archie Battle (another fantastic battle theme!)
- Drought (o-o)
- Dive
- Meteor Falls
- Legendary Battle (god the battle themes are awesome)
- Sootopolis City
- Ever Grande City
- Regi Battle Theme
- Elite Four Battle (seriously though!)
- Champion Battle (yeshshshs)
- Ending Theme (I absolutely adore this song ;-;)
- Battle Frontier
- Battle Dome (awesome!!! the other battle frontier areas have solid songs too)
- Battle Frontier Brain Battle 

Pokemon FireRed/LeafGreen (absolutely better than the originals overall)
- Opening/Title 
- Pallet Town (man this is really nice...)
- Oak's Lab
- Route 1
- Wild Pokemon Battle
- Viridian City
- Pokemon Center
- Viridian Forest (woah this is more intricate than I remember...)
- Trainer Battle (the classic)
- Gym Leader Battle
- Route 3
- Mt. Moon
- Cerulean City 
- Route 24
- Vermillion City (oh hell ya)
- S.S. Anne
- Bike Theme
- Route 11 (not as good as the original surprisingly...)
- Lavender Town
- Pokemon Tower
- Celadon City
- Game Corner
- Team Rocket Hideout
- Silph Co. (BIG improvement over the original)
- Surf theme
- Cinnabar Island
- Pokemon Mansion (nice and creepy)
- Four/Five Island (Azalea Town!!)
- Sevii Island overworld (Lake of Rage!!)
- Six/Seven Island (Cherrygrove...!)
- Mystery Gift (wi-fi song <3)
- Deoxys Battle (AWESOME BATTLE THEME IS AWESOME)
- Champion Battle (^^^^^^^^^)
- Epilogue Theme (wow this is...pretty nice...)
- Ending Theme (<3333)

Pokemon Pinball Ruby and Sapphire (my first video game ever!)
- Lots of stuff ripped straight from R/S...also features the R/S instruments for the original compositions!
- Ruby Field
- Sapphire Field (childhood classic)
- PokeMart
- Groudon (ONE OF THE MOST OVERLOOKED POKEMON TRACKS AND PROOF WHY THE RS TRUMPETS ARE GODLY...okay it's not AMAZING but it's shocking how few people know about this song)
- Unknown Track 1
- Unknown Track 3
- There are a lot of other songs that are marginally decent, but setting nostalgia aside, I didn't feel they were worth including

Pokemon Channel (Finding clean rips for this game is very hard. Nothing great, save for Home, but enjoyable nonetheless)
- Title Theme (has a nice Animal Crossing-vibe...)
- TV Delivery
- Home (another seriously overlooked track...that piano is so gorgeous)
- Outside (another very feel-good, Animal Crossing-like song)
- Viridian Forest 
- Cobalt Coast
- Shopping Channel
- Meowth's Party (ayy)
- Binder

Pokemon Colosseum (Nothing short of excellent, also huge on motifs geez)
- Title Screen (NOSTALGIAAAAA)
- Menu (AAHHHHHHH)
- Wes Steals the Snag Machine
- Outskirt Stand
- Friendly Battle (YESSSHSHSHSHSHSH)
- World Map (is this Advance Wars?)
- Normal Battle
- Phenac City
- Trainer School 
- Snagem Hideout
- Miror B's Retro Groove
- Cipher Peon Battle
- Pyrite Town
- Semifinal Battle
- Cipher Admin Battle
- Agate Village
- Relic Forest (it's stuff like this and Agate Village that make me wish I could express my love for this better than screams)
- Mt. Battle Rest Room (one of the best safe room songs ezpz)
- Mt. Battle
- Shadow Pokemon Lab
- The Under
- Realgam Tower
- Nascour's Theme
- Final Battle 
- Ending A
- Staff Roll (YES I LOVE THIS SONG TOO AND THIS WHOLE OST TBH)
- Battle Mode Menu (RSE <3)
- Vs Mode Battle 1 (RSE Gym Leader !)
- Vs Mode Battle 2 (RSE Champion !!!)
- Vs Mode Battle 3 (RSE Trainer)
- Virtual

Pokemon Dash (another very underrated OST by Miki Obata)
- Title Screen
- Green Cup (yessss)
- White Cup (yep)
- Blue Cup (YAAAAAAAAAAAAAAAAAS)
- Yellow Cup
- Red Cup (ysuusususus)

Pokemon Trozei (very underwhelming...Tawada was prolly busy with XD lol)
- SOL Lab
- Phobosphere Rising
- Nothing is BAD, but everything is way too short and feels underdeveloped...those two above songs are also a huge stretch 

Pokemon XD: Gale of Darkness (great stuff again!)
- Title Theme
- Trainer Battle
- Pokemon Lab
- World Map
- Dr Kaminko's Manor
- Heroic 
- Gateon Port
- Krabby Klub
- Cipher Peon Battle
- ONBS Building (my fuckin jammm)
- Wild Pokemon Theme (what a strange theme...)
- Battle SIM (yeahhahahhssssh)
- Battle Bingo Battle
- S.S. Libra (damn this is somber...)
- Cipher Key Lair (and this is pretty tense...!)
- Miror B's Theme
- Miror B Battle (GET DOWN)
- Citadark Island
- XD001
- Shadow Lugia Battle
- Greevil Battle (NOW THIS IS FUCKING EPIC)
- Greevil Redeemed (FeelsBadMan)
- Purify Chamber (DANCE PARTY)
- Vs Mode Menu
- Intro Theme
- Credits (lowkey one of my favorite Pokemon songs ;-;)

Pokemon Mystery Dungeon Red/Blue Rescue Team (I can't believe I forgot how incredible this OST was)
- Intro + Title
- Main Menu
- Personality Test
- Awakening
- There's Trouble
- Happiness
- Rescue Team Base (home :3)
- Thunderwave Cave
- Pokemon Square
- Friend Area: Field
- Friend Area: Steppe (wtf why do the friend areas have good music too)
- Friend Area: Forest
- Friend Area: Wilds
- Friend Area: Swamp (SERIOUSLY WHY)
- Friend Area: Pond
- Mt. Steel
- Boss Battle
- Silent Chasm 
- Mt. Thunder (YESSSSS)
- Mt. Thunder Peak (another song I low-key love)
- Great Canyon (adventureee)
- Legend of Ninetales
- Run Away, Fugitives (I feel shitty for not remembering this song in-game this is amazing ;-;)
- Mt. Blaze
- Kecleon Shop
- Stop! Thief!
- Mt. Blaze Peak (love the different feel this song gives uwu)
- Escape Through the Snow (really nice ambiance here...)
- Gardevoir 
- Mt. Freeze (Peak)
- Magma Cavern (Pit)
- Monster House (shiiiiit)
- World Calamity (wait WOAH IS THAT SKY TOWER???)
- Dream Eater (up there as one of the scariest songs in Pokemon)
- Sky Tower (THE BEST FUCKING SONG IN GEN 3 AND PERHAPS THE WHOLE SERIES HOLY SHIT THIS IS AMAZING)
- Sky Tower Summit
- Legendary Battle / Final Battle vs Rayquaza (I prefer Defy the Legends but this is damn good)
- The Other Side (ANOTHER VERY SCARY SONG O_O)
- Aftermath
- Parting / Farewell / Ending theme (;_______;)
- Credits Theme (.....)
- Friend Area: Oceanic
- Stormy Sea
- Buried Relic
- All of the Legendary Friend Areas are also kinda creepy...

Pokemon Ranger (It's...pretty good?...not GREAT, but good...)
Unless otherwise stated, the songs below are good enough to be noted, but they're not at all great
- Title theme (okay this is good)
- Fall City Harbor
- First Capture (I actually quite like this theme)
- Ringtown
- Ranger Base
- Krokka Tunnel
- Boss Theme
- Fall City
- Summerland
- Olive Jungle
- Go Rock Quads Theme
- Strong Go Rock Squad Battle
- Jungle Relic Unerupted
- Jungle Relic Erupted (okay this one's surprisingly good...)
- Panula Cave
- Wintown
- Go Rock Squad Hideout (definitely one of the better songs here)
- Final Go Rock Quads Battle
- Fiore Temple
- Go Rock Squad Basement / Gordor's Theme (HOLY SHIT)
- Raikou and Suicune Theme (remix of First Capture, and also quite good)
- Entei Theme (damn, this is pretty great!)
- Ranger Net
- Legendary Battle
- Browser Complete (wtf why is THIS one of the best songs???)
- Manaphy Egg
- Ending Theme (wow ok this is pretty depressing ;-;)
- Credits (This too oml this is quite great)

Misc Notes
- Ignoring any of the PC games (I actually played Master's Arena and Team Turbo and I don't recall them having actually good music :/)
- No music lists exist for PokePark Fishing, and the music seems decent at best judging from gameplay

Rankings:
1. (TIE) Mystery Dungeon 
1. (TIE) RSE
2. Colosseum
3. Firered/Leafgreen
4. XD
* gap * 
5. Dash
* gap * 
6. Ranger
7. Channel
8. Pinball RSE
* BIG gap *
9. Trozei