It seems to ... generate different robot images, based on the names you type in, I guess?
based on http://robohash.org/ but doesn't seem to add anything other than the ability to see two robots side by side
it's just a quick way of comparing robohashes to see which looks cooler!
The "wars" and "Fight!" implies the robots will actually battle in some way. It's not clear that your site doesn't do anything but show you the non-fighting robots.
we would have called it robohashsidebysidecomparison.com but it didn't seem as sexy.