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Is there a case in Pokemon Go where the attacker and defender has a 1.56x effectiveness vs a 0.64x effectiveness the other way? | Pokemon Trainer Tips
From the answer in this question, it looks like type effectiveness for dual-type Pokemons can be "stacked up together". So if a Pokemon's attack move type is super effective towards both types of a dual-type Pokemon, then it is 1.25 x 1.25 = 1.56 effectiveness. The cases of 1.56 v ...