Music (SSB4-Wii U)

The music in  includes a wide variety of tracks. It consists of pieces taken directly from other Nintendo games and games with third-party representation, nearly all of the remixes from previous Super Smash Bros. titles, and brand new arrangements made especially for the Wii U version. The music collection is roughly twice as large as the previous home-console Smash game, Super Smash Bros. Brawl, and the audio quality has been noticeably improved.

Most of the music can be listened to in the game using the Sounds feature, though there are several tracks from the game that do not appear in the menu.

There are in total 494 tracks in Sound Test available.

Sounds track list
Much like in Brawl, the Sounds menu is accessible by default and does not need to be unlocked. However, several tracks must be unlocked themselves via various methods. Others only appear in the list if a DLC purchase is made.

The following is the full track list of the Music portion of the Sounds menu in the game, with the "Series" sort order selected (with the exception of the Super Smash Bros. series as detailed below). Note that the game shows every track in a single large list; the original series names are not explicitly mentioned, and the ones on this page are unofficial.

Super Smash Bros.
In the game, the first three tracks (Menu, Battlefield, and Final Destination) are placed at the top of the list, while the rest (Results Display Screen onwards) are listed on the bottom underneath the Nintendo section.

Tracks not listed in Sounds
The following tracks are present in the game, but are not listed in the Sounds menu. Note that some of the names may not be official. Besides the tracks listed below, there are also 32 victory themes available in the game.

3DS tracks missing in Wii U version
Of the 135 songs present in the Nintendo 3DS version's Sound Test, only 12 weren't present in the Wii U version. Songs denoted in bold would also not return in Ultimate.
 * Super Smash Bros.
 *  (3DS variation)
 * Super Mario Bros.
 * Kirby
 * Pokémon
 * Kid Icarus
 *  (original version)
 * Pokémon
 * Kid Icarus
 *  (original version)
 * Pokémon
 * Kid Icarus
 *  (original version)
 * Kid Icarus
 *  (original version)
 *  (original version)
 *  (original version)

Tracks missing from previous games
There are many songs that were present in 64, Melee, and Brawl which did not return for SSB4, excluding the Metal Gear songs as that universe is entirely absent. Songs denoted in bold would also end up not returning in Ultimate.
 * Super Smash Bros. [excluding short jingles]
 * Opening (Super Smash Bros.)
 * How to Play (Super Smash Bros.)
 * Character Introduction Stage
 * Menu (Super Smash Bros.)
 * Character Select (Super Smash Bros.)
 * Battle Results (Super Smash Bros.)
 * Training Mode
 * Final Destination (Super Smash Bros.)
 * Bonus Game (Super Smash Bros.)
 * Duel Zone
 * Meta Crystal
 * Ending (Super Smash Bros.)
 *  Credits (Super Smash Bros.) [original version]
 *  (Super Smash Bros. Melee)
 *  [Brawl remix]
 *  (Super Smash Bros. Melee) [original version]
 *  (Super Smash Bros. Melee) [Brawl remix]
 * How to Play (Super Smash Bros. Melee) [Brawl remix]
 *  (Super Smash Bros. Brawl)
 *  (Super Smash Bros. Brawl)
 *  (Super Smash Bros. Brawl)
 * Super Mario Bros.
 * Donkey Kong
 * The Legend of Zelda
 *  [original version]
 *  [original version]
 * Metroid
 * Planet Zebes Stage
 * Yoshi
 *  [Brawl remix]
 * Kirby
 *  [original version]
 * Star Fox
 * Sector Z Stage
 * Pokémon
 * Saffron City Stage
 *  [Brawl remix]
 * EarthBound
 * Wario
 * Pikmin
 * Sonic the Hedgehog
 * Nintendo
 *  [Brawl arrangement]
 * '' [original version]
 * Donkey Kong
 * The Legend of Zelda
 *  [original version]
 *  [original version]
 * Metroid
 * Planet Zebes Stage
 * Yoshi
 *  [Brawl remix]
 * Kirby
 *  [original version]
 * Star Fox
 * Sector Z Stage
 * Pokémon
 * Saffron City Stage
 *  [Brawl remix]
 * EarthBound
 * Wario
 * Pikmin
 * Sonic the Hedgehog
 * Nintendo
 *  [Brawl arrangement]
 * '' [original version]
 * Wario
 * Pikmin
 * Sonic the Hedgehog
 * Nintendo
 *  [Brawl arrangement]
 * '' [original version]
 * Pikmin
 * Sonic the Hedgehog
 * Nintendo
 *  [Brawl arrangement]
 * '' [original version]
 * Nintendo
 *  [Brawl arrangement]
 * '' [original version]
 * Nintendo
 *  [Brawl arrangement]
 * '' [original version]
 *  [Brawl arrangement]
 * '' [original version]
 * '' [original version]
 * '' [original version]
 * '' [original version]

Tracks only used in trailers
While most of the songs used in the trailers (both for fighters and for Mii costumes) and in Smash-related Nintendo Directs are available in-game, there are a few exceptions. Songs denoted in bold were later added in a later entry, either as the original version or as a remix.
 * Super Mario Bros.
 * Peach's Castle Stolen
 * Overture (Super Mario Galaxy)
 * Battleship
 * Attack of the Airships
 * Bowser Jr.'s Fiery Flotilla
 * Super Mario Bros. 3 - Overworld (Edit)
 * Beware the Forest's Mushrooms
 * Kirby
 * Opening (Kirby Air Ride)
 * Fire Emblem
 * Omen / Main Theme (Fire Emblem: Awakening)
 * Prelude to Disaster
 * Kid Icarus
 * The Chaos Vortex
 * Destroyed Skyworld [original version]
 * Opening (Kid Icarus: Uprising) [higher-pitched]
 * Animal Crossing
 * Title Theme (Animal Crossing)
 * Wii Fit
 * Yoga
 * ''Unknown 'Wii Fit' music
 * Super Hoop [original version]
 * Punch-Out!!
 * Jogging [new arrangement that is not in either Punch-Out!! nor Smash]
 * Countdown [original version]
 * Duck Hunt
 * Game Start and Shot Duck jingles
 * Mega Man
 * Dr. Wily Stage 1
 * Namco
 * Dist Thins Out (Character Select)
 * Like a glint of light
 * Symphonic Druaga
 * Street Fighter
 * Arcade Intro [albeit slightly different]
 * Final Fantasy
 * Opening - Bombing Mission
 * Electric de Chocobo
 * Nintendo / Other
 * Splattack!
 * Beginning (VF2)
 * Proof of a Hero ~ 4Version

Trivia

 * Prerelease screenshots show that three song titles were changed during development: "Ballad of the Goddess/Ghirahim's Theme" was originally just "Ballad of the Goddess", "Saria's Song/Middle Boss Battle" was originally just "Saria's Song", and "Bramble Blast" from Brawl was changed to "Stickerbush Symphony". The latter applies for as well.