Simply choose what level of damage an attack of the first type would have against a defending Pokémon of the second type!
You can click on the buttons or use your keyboard's 1-4 keys to quickly make a selection.
As you play a type chart will be filled out. If your guess is correct, it will be shown with a green background. If your guess is incorrect, it will be shown with a red background and the correct answer will be shown next to your guess.
All data is from the 6th generation games (accurate up to and including generation nine at a minimum).