Currently, the Pokemon type chart has alt-text to show the resulting effect when a particular type of attack is used on a particular type of Pokemon, but nothing happens if the user clicks on any of the cells in that table. It would be very useful to include a list of all Pokemon(or at least base Pokemon) whose type/attack combination match the result of each cell. This could be added as a popup when clicking on the cell. This would, of course, need to be updated whenever new Pokemon are added to the game.
This would be a great resource when trying to build a team of Pokemon for a new raid, a special battle league, taking down a gym, etc. Hopefully, it would not be too difficult to implement.