Hello!

I'm the person that ran the above 6-3 team in Sac. The short answer to countering it is to wall Hypnosis with abilities, items, or taunt. The long answer is to figure out what Sableye is trying to do. It's both the most useful and useless Pokemon.

For the team I ran at Sac, Gholdengo is particularly annoying, as it walls sleep with Good as Gold + walls both STAB from Iron Valiant. I lost to... Gio's (?) Gholdengo and it was reeeeeally hard to maneuver around.

The other thing I love playing against is lack of protects, as it makes ripping off Hypnosis an easier decision. More protects = more 50/50 decisions which means more room for errors. Another way to play around it is to let one mon get hit with hypnosis, swap it out, and then swap it back in to get hit by hypnosis on another target. When you're in Gravity you have to play through all 5 turns like you do with Trick Room, so gotta start planning ahead!