http://replay.pokemonshowdown.com/customgame-182103083
I had this match with Sefrox99 for testing purposes and I
think there's a bug or 2 in here.
For 1: I have a Mew with Metronome in 4 moveslots. I used 1 'slot' up fully. I had 0 PP left on the first one. I tried to use it the turn after I ran out and it said I had no more PP left. Yet I didn't struggle. I don't know if this is something Custom Game related, but I am pretty sure it should have let me struggle.
For 2: Even though my opponent had Pressure it did not make me use 2 PP per turn. As you saw it took 16 turns for me to run out of Metronome instead of 8. I don't know if this is a Metronome mechanic or anything, but I felt like sharing it.