You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="B.E.S._Covered_Core|4421" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1075" ns="0" title="Power Capsule" />
      <page pageid="1079" ns="0" title="Solar Flare Dragon" />
      <page pageid="1088" ns="0" title="Victory Viper XX03" />
      <page pageid="3556" ns="0" title="Big Core" />
      <page pageid="3583" ns="0" title="B.E.S. Crystal Core" />
      <page pageid="3585" ns="0" title="B.E.S. Tetran" />
      <page pageid="3945" ns="0" title="Shadow of Infinity" />
      <page pageid="4248" ns="0" title="Dark Revelation Volume 4" />
      <page pageid="5380" ns="0" title="Boss Rush" />
      <page pageid="9524" ns="0" title="Crimson Crisis" />
    </pages>
  </query>
</api>