Super Smash Bros. was originally intended to have 16 custom moves per character.
The final version of Super Smash Bros. only features 12 custom moves per fighter, but Nintendo left animations for some of the cut moves in place.
A Youtuber called RED has dug these cut mvoes out of the brawler’s code, and displayed them in the videos below for your pleasure. Note that the moves aren’t just “switched off”, waiting for a DLC update; they’re not finished, with no hitboxes, for example.
Many of them seem a bit redundant, to be honest; creator Masahiro Sakurai was probably right to trim things down a bit.