Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
I tried and got a lot of unrelated topics. Perhaps my Google search was too long so I'll try refining my search with less words in hopes to hit a few keywords with more accuracy. Thank you.
I did know it wasn't an exact addition at least in older games I stopped playing after diamond and pear...
The basics if I'm right...
Fire pokes using fire moves does more damage than any other type using same move
Type opposite do more or less damage
Fire does more damage to steel and grass type pokes but less damage to water type pokes.
Sp.Atk effect the damage of special attack moves noted...