Zombie Revenge

Cheat mode:
Accumulate points in the VMU mini-game to unlock the "Eternal Life", "Area Select", "Free Continue", and "Free Time Limit" cheat options in original mode.

Alternate costumes:
Highlight a character, then hold Start and press B, X, or Y.

To get a fourth costume for Stick Brietling, go to the options screen set the difficulty to "Very Hard", and credits to "15". Select "Original Mode"m then select "Normal Mode". Highlight Stick Brietling, then hold theStart and press Y at character selection screen. His armor will be read during game play.

Level select:
Select fighting mode. Then, hold Start while selecting a character. Alternately, select fighting mode. Choose either "1 VS 2" or "1 VS CPU" options, then hold L + R + Start and press A. 

Blood color option:
Successfully complete the game in arcade mode to unlock the "Blood Color" option.

Free play:
Successfully complete the game in all three original modes to allow free play in arcade mode. 

Fight as Stick 2:
Enter Fighting mode and press Start to select Stick Breitling.

Fight as Linda 2:
Enter Fighting mode and press Start to select Linda Rotta.

Fight as Busujima 2:

Enter Fighting mode and press Start to select Rikiya Busujima.

출처 : http://www.gamewinners.com/DC/ZombieRevenge.htm