Yes, that’s right, you can have comments displayed in your blog or site running on WordPress without using neither the classic pre-built Recent Comments Widget nor any of the Recent Comments Plugins that are available out there for everybody to use. To do so you need to have two pieces of PHP code with little (X)HTML code around it.
MORE HERE: http://www.wplancer.com/how-to-display-recent-comments-without-using-a-plugin-or-widget/