I face Fly Roost SUB DD Dnite with Protect SUB Suicune and Fly PP didn't seem to be affected by Pressure at all. Android doesn't kept track of PP well but he used far more than the 12 Fly PPs he should have had. Nature Madness will round to 50% even when vs odd hp Pokemon such as Volcarona (damage should be 49%) and put it into Brine's power boost range.