Besides type filters, you can filter by game and by evolution stage. The game filter shows only Pokemon available in a specific title. The evolution stage filter shows only basic, Stage 1, Stage 2, or non-evolving Pokemon. Both are in the left sidebar on the Pokedex page.
Step 1
Go to pokepedia.com/pokedex and look at the filter panel on the left. Below the type filters you'll find "Evolution Stage Filters" and "Games" sections.
Step 2
To filter by evolution stage, click one of the options (Basic, Stage 1, Stage 2, or No Evolution). The grid updates instantly. Good for when you only want to see fully evolved Pokemon or just base forms.
Step 3
To filter by game, scroll to the Games section and click a title. Clicking "Pokemon Yellow" shows only Pokemon you can get in that game. Helpful for planning a team or checking what's catchable.
Step 4
You can combine these. Filter by Pokemon Red, then Fire type, then Stage 2. Now you're looking at only fully evolved Fire types available in Pokemon Red.
Step 5
Hit "Clear Filters" to reset everything back to the full National Pokedex.