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>
    <allimages aicontinue="Battle_report_defender.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="BarraDeMenú_Botón_Héroes.png" timestamp="2010-03-24T20:05:42Z" url="images/xhodon_wiki_it/0/0f/BarraDeMen%C3%BA_Bot%C3%B3n_H%C3%A9roes.png" descriptionurl="https://wiki.xhodon.it/File:BarraDeMen%C3%BA_Bot%C3%B3n_H%C3%A9roes.png" ns="6" title="File:BarraDeMenú Botón Héroes.png" />
      <img name="BarraDeMenú_Botón_Invocar.png" timestamp="2010-03-23T21:01:02Z" url="images/xhodon_wiki_it/c/c0/BarraDeMen%C3%BA_Bot%C3%B3n_Invocar.png" descriptionurl="https://wiki.xhodon.it/File:BarraDeMen%C3%BA_Bot%C3%B3n_Invocar.png" ns="6" title="File:BarraDeMenú Botón Invocar.png" />
      <img name="BarraDeMenú_Botón_Palacio.png" timestamp="2010-03-23T20:59:36Z" url="images/xhodon_wiki_it/7/72/BarraDeMen%C3%BA_Bot%C3%B3n_Palacio.png" descriptionurl="https://wiki.xhodon.it/File:BarraDeMen%C3%BA_Bot%C3%B3n_Palacio.png" ns="6" title="File:BarraDeMenú Botón Palacio.png" />
      <img name="Barra_de_Mana.png" timestamp="2010-03-23T21:02:04Z" url="images/xhodon_wiki_it/3/3a/Barra_de_Mana.png" descriptionurl="https://wiki.xhodon.it/File:Barra_de_Mana.png" ns="6" title="File:Barra de Mana.png" />
      <img name="Barra_de_menu_magia.PNG" timestamp="2010-04-10T18:56:05Z" url="images/xhodon_wiki_it/3/30/Barra_de_menu_magia.PNG" descriptionurl="https://wiki.xhodon.it/File:Barra_de_menu_magia.PNG" ns="6" title="File:Barra de menu magia.PNG" />
      <img name="Barra_dei_menu.jpg" timestamp="2010-03-25T20:06:07Z" url="images/xhodon_wiki_it/2/28/Barra_dei_menu.jpg" descriptionurl="https://wiki.xhodon.it/File:Barra_dei_menu.jpg" ns="6" title="File:Barra dei menu.jpg" />
      <img name="Barra_exp_Eroe.png" timestamp="2011-02-01T10:44:26Z" url="images/xhodon_wiki_it/4/4d/Barra_exp_Eroe.png" descriptionurl="https://wiki.xhodon.it/File:Barra_exp_Eroe.png" ns="6" title="File:Barra exp Eroe.png" />
      <img name="Battle_report.png" timestamp="2009-05-24T18:46:14Z" url="images/xhodon_wiki_it/3/38/Battle_report.png" descriptionurl="https://wiki.xhodon.it/File:Battle_report.png" ns="6" title="File:Battle report.png" />
      <img name="Battle_report_attacker.png" timestamp="2009-05-24T18:52:15Z" url="images/xhodon_wiki_it/2/2c/Battle_report_attacker.png" descriptionurl="https://wiki.xhodon.it/File:Battle_report_attacker.png" ns="6" title="File:Battle report attacker.png" />
      <img name="Battle_report_defeat.png" timestamp="2009-05-24T18:37:42Z" url="images/xhodon_wiki_it/d/d0/Battle_report_defeat.png" descriptionurl="https://wiki.xhodon.it/File:Battle_report_defeat.png" ns="6" title="File:Battle report defeat.png" />
    </allimages>
  </query>
</api>