Fight as Minazuki Zankuro:
Select versus mode and enter the character selection screen. Hold Start and highlight the following fighters in order: Haohmaru, Genjuro, Basara, Kyoshiro, Ukyom Rimruru, Haohmaru, Shizmarum Nakorurum Hanzo, Amakusa, Gaira, Galford, Shizmaru. Allow the timer to reach "03" while Shizmaru is highlighted, then press A + B. Minazuki Zankuro will appear in the center of the bottom row of fighters.

Blood mode:
Select Japan as a country at the options menu.

Easy power specials:
Select "Special" on the options menu, then press A + B + C + D while playing the game.

Bonus audio tracks:
Play the game disc in a standard audio CD player. One of the tracks near the end of the disc features a Japanese conversation between Nakoruru and Rimururu about Samurai Shodown RPG.