>>14288613When you think about it, though, if your Pokémon's stats are all twice your opponent's, you're hitting them with twice as much attack and taking their hits with twice as much defence, so even though you're twice the level, you're getting four times as much damage output.
And they're getting 1/4 as much damage output, so overall you'll do 16 times as much damage to them as they do to you.
I think.