So, if there's any stages in which you actually care about the music, post your favorite music/rank in order of probability.
Battlefield: Battlefield Ver. 2 [1st]
Battlefield [2nd]
Multi-Man Melee 1 (Melee) [3rd]
Battlefield (Melee) [4th]
Menu [5th]
Final Destination: Final Destination [1st, 100% bar]
Final Destination (Melee) [2nd tied, rare]
Giga Bowser (Melee) [2nd tied, rare]
Credits (SSB) [Never]
Delfino Plaza: Delfino Plaza [1st]
Main Theme (NSMB) [2nd]
Title / Ending (SMW) [3rd]
Luigi's Mansion: Luigi's Mansion [1st, 100% bar]
Tetris A [2nd]
Castle / Boss Fortress (SMW/SMB3) [3rd Tied, rare]
Airship Theme (SMB3) [3rd Tied, rare]
Mushroomy Kingdom: Gritzy Desert [1st]
Ground Theme (SMB) [2nd]
Ground Theme 2 (SMB) [3rd]
[UNDERGROUND ONLY] Underground Theme (NSMB) [1st, 1-2]
Mario Circuit: Title (3D Hot Rally) [1st]
Mario Circuit [2nd]
Luigi Circuit [3rd Tied]
Waluigi Pinball [3rd Tied]
Rainbow Road [4th]
Mario Tennis / Mario Golf [Never]
Rumble Falls: Jungle Level Ver. 2 [1st]
King K. Rool / Ship Deck 2 [2nd tied]
Battle for Storm Hill [2nd tied]
Jungle Level [3rd, rare]
DK Jungle 1 Theme (Barrel Blast) [3rd, rare]
The Map Page / Bonus Level [Never]
Bridge of Eldin: Main Theme (LoZ) [1st tied]
Ocarina of Time Medley [1st tied]
Hyrule Field Theme [2nd]
Title (LoZ) [3rd]
The Dark World [4th tied]
Hidden Mountain & Forest [4th tied]
Main Theme (TP) [4th tied]
Pirate Ship: Gerudo Valley [1st, 100% bar]
Dragoon Roost Island [2nd tied]
Song of Storms [2nd tied]
The Great Sea [3rd tied, rare]
Molgera Battle [3rd tied, rare]
Norfair: Theme of Samus Aran, Space Warrior [1st, 100% bar]
Marionation Gear [2nd]
Main Theme (Metroid) [3rd, rare]
Frigate Orpheon: Vs. Ridley [1st tied]
Vs. Meta Ridley [1st tied]
Sector 1 [2nd tied]
Vs. Parasite Queen [3rd]
Opening / Menu (Metroid Prime) [4th rare]
Yoshi's Island: Obstacle Course [1st]
Ending (Yoshi's Story) [2nd tied, rare]
Yoshi's Island [2nd tied, rare]
Wildlands [2nd tied, rare]
Halberd: Meta Knight's Revenge [1st tied]
Gourmet Race [1st tied]
Boss Theme Medley [1st tied]
The Legendary Air Ride Machine [2nd]
Butter Building [3rd tied, rare]
King DeDeDe's Theme [3rd tied, rare]
Squeak Squad Theme [3rd tied, rare]
Frozen Hillside [3rd tied, rare]
Lylat Cruise: Star Wolf [1st]
Space Armada [2nd]
Tunnel Scene (X) [3rd]
Main Theme (Star Fox) [4th tied, rare]
Main Theme (Star Fox 64) [4th tied, rare]
Area 6 [4th tied, rare]
Star Wolf (Star Fox Assault) [4th tied, rare]
Space Battleground [4th tied, rare]
Break Through The Ice [4th tied, rare]
Pokemon Staduim 2: Pokemon Main Theme [1st]
Wild Pokemon Battle [2nd]
Pokemon Center [3rd tied]
Pokemon Gym / Evolution [3rd tied]
Road to Viridian City [4th rare]
Spear Pillar: Victory Road [1st tied]
Wild Pokemon Battle (D/P) [1st tied]
Dialga / Palkia Battle at Spear Pillar! [2nd, rare]
Port Town Aero Dive: Mute City [1st]
Fire Field [2nd]
White Land [3rd tied]
Devil's Call in Your Heart [3rd tied]
Climb Up! And Get The Last Chance! [3rd tied]
Golden Forest (1080 Snowboarding) [4th, rare]
Brain Cleaner [5th tied, rare]
ShotGun Kiss [5th tied, rare]
Planet Colors [5th tied, rare]
Castle Siege: Against the Dark Knight [1st]
Fire Emblem Theme [2nd tied]
With Mila's Divine Protection [2nd tied]
Attack [2nd tied]
Fire Emblem (Melee) [3rd]
Crimean Army Sortie [4th tied, rare]
Ike's Theme [4th tied, rare]
Victory is Near [5th, rarest]
Preparing to Advance [Never]
WarioWare: Ashley's Song [1st]
WarioWare, Inc. [2nd]
WarioWare, Inc. Medley [3rd tied]
Ashley's Song (JP) [3rd tied]
Mona's Pizza Song [4th tied, rarest]
Mona's PIzza Song (JP) [4th tied, rarest]
Distant Planet: Main Theme (Pikmin) [1st tied]
Stage Clear / Title (Pikmin) [1st tied]
Forest of Hope [1st tied]
World Map (Pikmin 2) [2nd tied, rare]
Ai no Uta [2nd tied, rare]
Tane no Uta [2nd tied, rare]
Title (Big Brain Academy) [2nd tied, rare]
Environmental Noises [Never]
Smashville: Go K.K. Rider! [1st]
Title (Animal Crossing) [2nd]
2:00 AM [3rd, rare]
Town Hall and Tom Nook's Store [Never]
The Roost [Never]
New Pork City: Unfounded Revenge / Smashing Song of Praise [1st, 100% bar]
Porky's Theme [2nd]
Humoresque of a Little Dog [3rd, rare]
Summit: Shin Onigashima [1st, 100% bar]
Ice Climber [2nd]
Balloon Trip [3rd tied]
Clu Clu Land [3rd tied]
SkyWorld: Underworld [1st tied]
SkyWorld [1st tied]
Kid Icarus Original Medley [1st tied]
Mario Bros.: Famicom Medley [1st, 100% bar]
Mario Bros. [2nd]
Power-Up Music [Never]
Flatzone 2: Flat Zone 2 [1st tied]
Chill (Dr. Mario) [1st tied]
Flat Zone (Melee) [1st tied]
PictoChat: PictoChat [1st]
Dr. Mario (Melee) [2nd]
Mii Channel [3rd tied]
Brain Age: Train Your Brain in Minutes a Day [3rd tied]
Opening Theme (Wii Sports) [3rd tied]
Charge! (Wii Play) [3rd tied]
Shaberu! DS Cooking Navi [3rd tied]
Shadow Moses Island: MGS4 ~Theme of Love~ SSBB Version [Never]
Encounter [Never]
Theme of Tara [Never]
Battle in the Base [Never]
Yell "Dead Cell" [Never]
Cavern [Never]
Snake Eater (Instrumental) [Never]
Calling to the Night [Always]
[

]
Green Hill Zone: Live & Learn [1st]
Emerald Hill Zone [2nd tied]
Angel Island Zone [2nd tied]
Scrap Brain Zone [3rd tied]
Sonic Boom [3rd tied]
Open Your Heart [3rd tied]
Green Hill Zone [4th tied]
Seven Rings in Hand [4th tied]
Melee Stages: All of the mare the original.