Originally Posted by Fat preserve
Ambipom holding a metronome
With an agility it will be faster than almost anything and holding a metronone its Last Resort will slowly increase after each attack. The only thing you will have to worry about is something that resists or is immune to normal attacks and losing all your PP.
Lugia holding a chesto berry
Calm Mind is there to raise Lugia's Special Attack and Special Defense even higher while Rest is there because a lot of people like to toxic walls like lugia, and with a Chesto he get's a free heal, without wasting two turns to rest. The last two options can be any Special moves to deal with most of Lugia's checks and counters. Also, with the ability pressure he can stall out the enemy's PP.
No, just no. There are a total of 14 OU Pokemon that are immune or resistant to Last Resort - that's at least one on most teams. Also, Ambipom is frail as hell and vulnerable to all common priority. It will not be able to both set up and stay alive for long enough to sweep. It isn't that powerful either: On the first attack it does a maximum of 45% to Gliscor, and many other walls do just as well. Once your ploy is revealed, switching to a resist and stalling out Last Resorts 8 PP is not hard. In short, Ambipom is a terrible Pokemon to use in OU these days and this set just makes it worse.
This isn't a thread for discussing Ubers so that has no place here at all. Go to the Uber's forum, I'm sure they have an equivalent thread somewhere.