>>31452984Intimidate is a broken Ability, even more than in singles.
Hitmontop is a bulky pokemon with a very great supportive movepool (Wide Guard, Feint, Fake Out, Helping Hand, Quick Guard), priority to off-set is low speed (Sucker Punch, Mach Punch, Bullet Punch) and it hits decently hard with Close Combat (OHKO'd Mega Mom at neutral)
In VGC 2016, Hitmontop was using Wide Guard, to wall Eruption/WaterSpout/DazzlingGleam from the Primals and Xernias, Fake Out for pressure, Feint to break through mindgames (and KO Smeargle after it went to it's sash) and utilized Intimidate to Keep the damage output from Groudon and Mega Kangaskhan at bay, while also allowing your own Kyogre to live Ferrothorn's Power Whip.
The key Item in 2016 was Eject Button, because it allowed Hitmontop to get two Intimidates off pretty much always.
The metagame was so high damage, that most of the time, your Sitrus Berry Pokemon would just die regardless, so the pros preferred to take one hit and get a switch over saccing Hitmontop, especially if it doesn't have protect.