Super Smash Bros. for Nintendo 3DS / Wii U ♪—A Smashing Soundtrack—
From SmashWiki, the Super Smash Bros. wiki
The Super Smash Bros. for Nintendo 3DS & Wii U soundtrack, subtitled A Smashing Soundtrack in the North American version, Special Sound Test in the Japanese version and Premium Sound Selection in the European version, is the official soundtrack of Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U. The album is split into two discs, each containing 36 tracks; the "Red" CD contains music primarily from the 3DS version, while the "Blue" CD contains music from the Wii U version.
The soundtrack was available for free to anyone who registered both versions of the game on Club Nintendo between November 21, 2014 and January 13, 2015, and the soundtrack was shipped between February and March of that year. It was not officially sold or otherwise distributed outside of Club Nintendo, though it can still be purchased secondhand on a number of online retailers.
A more detailed list can be found here.
Red CD Tracklist
Blue CD Tracklist