Before anyone starts talking about who could beat who in a fight, this is NOT a vs thread, so no "Yondaime is faster" or "Rasengan >>> Hidden Snake Hands" or anything like that This is about who is the greatest genius, which really comes down to the jutsu they have developed. Orochimaru has developed the Immortality Jutsu, which, as we know has it's flaws, but still allows him to live forever and never suffer the effect of a crippling wound or old age. He also has the Edo Tensie, which it cannot be denied is basscally unstoppable. Unless the opponent knows Fuuin no Jutsu; Shiki Fuujin , there is no way for them to stop the killing machines Oro can summon - even killing Oro himself will not stop them. We also do not know the upward number of zombies Oro can summon into battle, and it appears he can take his pick of anyone he wants. Yondaime on the other hand, created the Shiki Fuujin technique, which is of course able to kill any mortal outright (unless the user is a pensioner with a sword in thier ribcage), albeit at the cost of the user's own life. Regardless of being a double edged sword, this is one hell of a sword. Shiki Fuujin was powerful enough to seal the Kyuubi, the most powerful creature in the world, into Naruto. In addition there is the Rasengan, which in my opinion is the most powerful direct attack jutsu introduced so far, and a technique that perfectly combines power and control for devastating results. Finally for Yondaime is Spoiler: Manga spoilers The so called "Body Flicker" technique (I cant remember the original name so I'll use this nick) which, as far as I can see, allows Yondaime to move almost instantaniously from one of his special kunai to another. Instantanious movement is one hell of an achievement! Having thought it out, I cant actualy decide right now who is more worthy of the title of genius. How about you?