The Interactive Type Chart

Base chart: Changing this setting will reset any modifications to existing type relations.

Enable editing of existing types When this box is checked, you can edit or delete existing Pokémon types. Unchecking this box will revert any edits to existing types, ensuring that any relations between existing types match up with the games.

Your modifications to the type chart are automatically saved in your browser's local storage as you make them. The "Reset types" button will reset the type chart to the in-game base chart, with all customizations wiped. The "Reset to checkpoint" button will reset the type chart to whatever it was when you last loaded the page or when you last pressed the "Create checkpoint" button.

Add new type Reset types Reset to checkpoint Create checkpoint

Select the types of attacks whose coverage should be checked. The chart will show the greatest multiplier achievable against each combo with these attack types.

Get summary for multiplier: The chart will show the number of attack types that achieve this multiplier or a more extreme one in the same direction for each combo.

Get chart for combos of this type: If you filter on a type, essentially the whole chart will be multiplied by the multiplier when the attacking type attacks that type.

Calculate average for these attack types:

Ignore nonexistent combos in generation
Symmetrical When this box is checked, the combo modes will fade cells corresponding to type combinations that no actual existing Pokémon in the relevant generation currently have, and all summary cells will discount the contents of those cells. If the "Symmetrical" box is checked, a combination is treated as existent if either it or its inverse exists; if it is unchecked, Flying/Normal will for instance be treated as nonexistent, which may or may not be what you want.