true. in X6 gate found zero's DNA trying to analysing it but then gate was infected unnoticed because zero's DNA was still infected bu the virus after X5 that how gate created the nightmare virus. zero came back alive as the nightmare zero since X was dreaming about zero he should fight him and bring back to normal. the nightmare virus can cause other reploids to go irregular that would be bad zero was surprised that his DNA was on gate that he was holding zero blaming himself causing to the entire world.
first of all, Nightmare Zero is not Zero, he is a clone.
second, I STILL dont understad you.
third, from what i can gather, we have already established that stuff, and it has nothing to do with the subject matter...