For Genesis (the one I have) the blood code is something like ABACABB on the Kode of Honor screen and it should tint red if done right. Also there is the DULLARD code which opens cheats enabled and gives you access to loads of shit and some funny glitches. Uh, beyond that just Game Enhancer stuff I think (not proper codes). Just do some internet searches or go to pages like mktemple.com or other cheat resources online.