Press R2 and L2 at the same time when your special metter is full, and if the screen says Times 2 press it twice
Choose VS mode, in the character select screen hold down the start button and highlight the following character in order:Haohmaru, and then go to Ganjuro, Basara,Kyoshiro, Ukyo, Rimruru, Haohmaru, Shizmaru, Nakoruru, Hanzo, Amakusa, Gaira, Galford and then Shizmaru. Keep holding start and then press X and O at the same time.