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>
    <pages>
      <page pageid="133" ns="0" title="Catchable Pokémon" contentmodel="wikitext" pagelanguage="en" touched="2018-12-11T18:10:32Z" lastrevid="22583" counter="73870" length="123655" />
      <page pageid="146" ns="0" title="Tokens" contentmodel="wikitext" pagelanguage="en" touched="2020-10-08T16:00:51Z" lastrevid="22976" counter="316216" length="10400" />
      <page pageid="197" ns="0" title="Update log" contentmodel="wikitext" pagelanguage="en" touched="2012-08-06T21:29:39Z" lastrevid="7962" counter="25842" length="32620" />
      <page pageid="378" ns="0" title="Layering basics" contentmodel="wikitext" pagelanguage="en" touched="2011-01-20T15:05:12Z" lastrevid="725" counter="4173" length="1710" new="" />
      <page pageid="404" ns="0" title="Ladder" contentmodel="wikitext" pagelanguage="en" touched="2011-01-20T15:05:12Z" lastrevid="1306" counter="10749" length="4297" />
      <page pageid="499" ns="0" title="Travelling around" contentmodel="wikitext" pagelanguage="en" touched="2012-08-06T21:46:55Z" lastrevid="1050" counter="4879" length="1581" />
      <page pageid="532" ns="0" title="Contacting Staff" contentmodel="wikitext" pagelanguage="en" touched="2013-11-22T03:52:45Z" lastrevid="12303" counter="17326" length="3262" />
      <page pageid="1252" ns="0" title="Forum Rank" contentmodel="wikitext" pagelanguage="en" touched="2020-08-17T15:25:49Z" lastrevid="22966" counter="7933" length="8" />
      <page pageid="1598" ns="0" title="Playerdex Mart" contentmodel="wikitext" pagelanguage="en" touched="2024-12-01T18:21:49Z" lastrevid="27379" counter="31492" length="7325" />
      <page pageid="2460" ns="0" title="Route 46" contentmodel="wikitext" pagelanguage="en" touched="2025-05-23T03:11:57Z" lastrevid="27563" counter="35569" length="858" />
    </pages>
  </query>
</api>