At the Select screen in a Player Versus game press UP, DOWN, LEFT, UP, DOWN, RIGHT+A. The player who wants to play as Kuroko should press these buttons. After the match the game will reset.
Samurai Shodown II
Go into options menu. Highlight Exit and press A + B + C + D simultaneously.
Start a two-player game. On the character select screen, press Up, Down, Left, Up, Down, Right + A. You may now select Kuroko.
Samurai Shodown III: Blades of Blood
Boss Code from Jarred White (firstname.lastname@example.org)
This cheat works only on two-player mode. At the fighter select screen, hold Start and
move the cursor over to the following characters starting at Haohmaru: Genjuro, Basara, Kyoshiro, Ukyom Rimruru, Haohmaru, Shizmarum Nakorurum Hanzo, Amakusa, Gaira,
Galford, Shizmaru. With the cursor on Shizmaru, wait until the timer reaches 03 and then
simultaneously press A and B. If you did this correctly, Zankuro's picture will appears in
the middle of the bottom row of characters.
Samurai Shodown IV: Amakusa's Revenge
Blood Code from VjJester@aol.com
At the title screen, hold down Start and highlight "Options". Press A to enter Options and, while still holding Start, move the cursor to "EXIT". Now press A + B + C + D simultaneously. The game will now have blood and "No Contest" moves.
Play as Zankuro - CD version from VjJester@aol.com
Start a two-player game. At the character select screen, hold D and press A. You can now play as Zankuro.