Pokemon.com is built with the following tech stack:
Document Standards
Javascript
JavaScript is a scripting language most often used for client-side web development.
WAI-ARIA
A way to make Web content and Web applications more accessible to people with disabilities. It especially helps with dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies.
HTML5 DocType
The DOCTYPE is a required preamble for HTML5 websites.
HTML 5 Specific Tags
This page contains tags that are specific to an HTML 5 implementation.
Content Type Options
Used to disable MIME-sniffing for a particular HTTP response.
Mobile
Apple Mobile Web Clips Icon
This page contains an icon for iPhone, iPad and iTouch devices.