The Pokédex is a different way to look at the catalog: by Pokémon instead of by set. It is great for collectors chasing a favorite Pokémon or completing a generation.
Every Pokémon has its own entry listing the cards it appears on. Open one to see the printings and variants, with prices and links to the marketplaces.
When you are signed in, the Pokédex reads your portfolio and marks which cards you already own and which are still missing, with a small progress indicator per Pokémon. It is an easy way to see the gaps in your collection.
Filter by generation and by language (English, German, Italian, Japanese, Korean, Simplified Chinese, or all together), and focus on just the cards you have collected or just the ones you are missing.
The Pokédex is free for everyone, signed in or not.