About Coded Yellow
A Pokémon TCG Collector Resource
Coded Yellow is a dedicated resource for Pokémon card collectors, offering clear guides, complete card lists, product information, and beginner-friendly explanations of the Pokémon Trading Card Game. Whether you’re researching older sets, exploring card rarities, or learning the hobby from scratch, this site is designed to make collecting easier, clearer, and more accessible.
Meet the Author
Hello, I’m Heather Yasmin Wheeler, the creator and editor behind Coded Yellow.
You’ll also find me online as Heather Wheeler, Heather Yasmin, Heather, or Hetha.
I’ve been part of the Pokémon world since 1999, when the TCG first arrived in the UK. Over the years, collecting and researching Pokémon cards has grown from a hobby shared with my two children into a long-term passion and an area of real expertise. I specialise in:
Tracking product releases
Identifying card artwork variations
Understanding rarity patterns
Cataloguing Pokémon card lists
Breaking down TCG concepts for beginners
My goal is to give collectors the kind of organised, accurate, no-nonsense information I always wished existed when I started.
Why I Created This Site
During the pandemic, many people rediscovered old hobbies – including myself.
As I returned to the TCG, I realised that most Pokémon websites were either:
Too complex for beginners or Focused on the Trading Card and Video Games
I wanted to create something different:
A clear, reliable collector resource, written in plain English to include helpful guides, examples, and curated information.
Throughout Summer 2025, the site went through a major refresh to improve the site organisation and to refocus the content around clearer card guides and collector-friendly resources. As part of this ongoing effort, older articles are in the process of being reviewed and updated to ensure they meet the needs of today’s Collectors and continue to be accurate, consistent, and relevant.
Today, Coded Yellow features nearly 2000 pages of organised TCG material, and I continue updating and adding articles to the site every week as new Sets and Products are revealed.
Experience, Expertise & Approach
My Background
As a qualified teacher and long-time webmaster, I specialise in explaining complex information clearly and making it easy to understand. My background in research and education directly shapes how I write about the TCG.
How I Build the Content
Every page is based on verified information, including:
Official Pokémon documentation
Pokémon Center product listings
Manufacturer release data
Card-by-card inspection
Collector community confirmation
Cross-checking with official card numbers and symbols
No article is published without careful fact-checking and comparison with official sources.
Focus on Accuracy
I take a careful, methodical approach to content creation:
Product contents are verified against official listings
Set information is cross-referenced
Card lists are reviewed for accuracy
Articles are regularly updated when new information becomes available
I do not add unnecessary text or keyword padding. Articles on this site are written to be informative, concise, and useful.
What You Will Find Here
Since the Summer 2025 re-organisation, Coded Yellow is now organised into clear collector-focused sections:
TCG Products – Buyer guides, product release timelines, product types – ETBs, Collection Boxes and tins
TCG Sets – Complete and prospective card lists and card galleries
TCG Card Guide – Rarities, mechanics, energy cards, chase cards
Pokémon in the TCG – Type info, regional info, top 10s / top 20s, card lists for all Pokémon
Trainers in the TCG – Trainer types, regional info, card lists for all Trainers
TCG History – General history, expansion sets timeline, product artwork timelines, card design history
If you love collecting, cataloguing, researching, or simply appreciating the art and history of Pokémon cards, you’re in the right place.
A Promise to Readers
I care deeply about producing content that is:
Accurate
Transparent
Clear
Beginner-friendly
Useful to collectors
Written in plain English
Updated when new products or sets release
Coded Yellow is built with the Pokémon TCG community in mind – a place where collectors of all levels can access reliable information and resources.