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 Shadow Clone Jutsu, and was turned into his down smash. Naruto uses Rasengan and then smashes the ground with it. This attack became Naruto's down smash in Version 0.5 alpha of the SSF2 Demo but was removed in subsequent versions. The details of this attack have apparently been permanently lost to the archives of flash2dojo].