Rasengan Smash

Rasengan Smash was originally thought to be Naruto's down special move in Super Smash Flash 2, instead, it was replaced with the Kage Bunshin. Naruto uses Rasengan and then smashes the ground with it. According to the third Smash Flash DOJO!!, the closer opponents are to Naruto, the more damage this attack would have dealt.

A dumbed-down version of this attack was made into his Down Smash in version 0.5 alpha of the Super Smash Flash 2 Demo, but was removed in subsequent versions for reasons unknown.