Samurai Shodown

Takara
Genre: Fighting
Players: 1-2

Play as Kuroko
from Robert Knickerbocker
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

Takara
Genre: Fighting
Players: 1-2

Blood
Go into options menu. Highlight Exit and press A + B + C + D simultaneously.

Hidden Referee
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

Takara
Genre: Fighting
Players: 1-2

Boss Code
from Jarred White (nna@inetworld.net)
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

Takara
Genre: Fighting
Players: 1-2

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.

Note: This trick is for the CD system only.