Pressure cannot be 'targetted' at any particular Pokemon, it affects all Pokemon on the field other than the wielder of the ability.
And since while targetting multiple Pokemon with a single attack takes away only one PP, Pressure acts like normal in most situations involving this.
So no matter what happens, an extra PP goes if the Pokemon with Pressure is present on field. And that means all moves, including Status and self-afflicting moves.
Hope I helped!