Super Smash Bros. for Nintendo 3DS and Wii U - Wikipedia
Smash Bros. Wii U/3DS partial soundtrack listing (The Great Cave Offensive stage essentially confirmed)
Super Smash Bros. For Wii U Menu Transcription Sheet music for Piano, Trombone, French horn, Timpani & more instruments (Mixed Ensemble) | Musescore.com
Super Smash Bros. for Wii U: My Music
At least 437 songs in Smash Wii U | Super Smash Brothers | Know Your Meme