Giant Robot vs Ultraman

If it weren't for one factor, I would say that Ultraman would reduce Robot into a scrap metal heap or maybe a melted puddle of metal in minutes, if not seconds.

The one thing that stops me is that there has never really been a consistant measure of how much energy Ultraman uses before his light starts blinking, nor how much energy each of his powers take.

The other big problem is that since the two are in different fictional realities, there is no way to compare offense/defense between the two. We do not know how Ultraman's main offense, the Spacium ray, would affect Giant Robot. In fact, we can't even compare something as simple as their relative physical strengths.



There is however, one argument that can be very convincingly made for Ultraman winning this fight. All he would have to do is incapacitate Johnny Sokko and that would pretty much end the fight then and there.