it's Megaman Z or MMZ if you want to shorten it.
Zero is character's name and was never written as number in series.

Not strangely at all, I don't care. We do over 70 images a month, half the time I don't know who the characters are, and rarely have the time to research them. Generally speaking, I just post whatever the person requesting the image tells me it is from. But, the fact that you insisted on trying to correct my use of the number 0 instead of writing out Zero, also tells me that you are just being a troll. So, I have no fucks to give for comments like yours "Oh this characters is from blah blah blah."

Megaman 0
The one before Megaman 1