Akai Rasengan (赤い螺旋丸, Demon Fox Spiralling Sphere), also called Vermilion Rasengan (朱色螺旋丸) in other games, is the standard special move of Kyūbi Naruto in Super Smash Flash 2. Under the influence of Kurama's chakra, Naruto can improve his use of the standard Rasengan and simultaneously make up for his shortcomings in performing the technique. The chakra shroud surrounding him serves as a shell to stabilise the Rasengan's chakra. Due to the influence exhibited by the Nine-Tails' chakra, this Rasengan changed from its yellow or blue colour to a purple, orange, or red colour, made stronger than its standard version.