Empoleon and Rotom-H are two of the biggest bitches to any hail team in UU. Empoleon pretty much walls every Blizzspammer, and can set up Stealth Rock / Phaze, while Rotom-H applies incredible pressure to hail teams with Volt Switch and Overheat; one wrong prediction and it's GG.
About Froslass, it's a better abuser of evasion hax as it also has an immunity, meaning it can spinblock for the team, it has Taunt to rape stall, and it's Blizzards are nothing to laugh at. Froslass is, imo, the best abuser of perma-hail in UU atm. Sure, Walrein is great and all, but it requires an incredible amount of team support, not to mention it gets wrecked by Taunt. Froslass actually supports the team with Spikes, Taunt, and Thunder Wave. On that note, Mamoswine's a bitch to deal with as well. If you run some HP EVs and enough speed to outspeed uninvested Milotic / Suicune, it actually has some decent bulk. I've had success in the past with Substitute sets.
Also, why isn't anyone trying out rain or sun? I know that hail and sand are prevalent due to the permanent weather setters being present, but Sun now has things like Darmanitan and Chandelure, while rain got Tornadus. I, for one, plan on testing out both weather types soon :)
About Froslass, it's a better abuser of evasion hax as it also has an immunity, meaning it can spinblock for the team, it has Taunt to rape stall, and it's Blizzards are nothing to laugh at. Froslass is, imo, the best abuser of perma-hail in UU atm. Sure, Walrein is great and all, but it requires an incredible amount of team support, not to mention it gets wrecked by Taunt. Froslass actually supports the team with Spikes, Taunt, and Thunder Wave. On that note, Mamoswine's a bitch to deal with as well. If you run some HP EVs and enough speed to outspeed uninvested Milotic / Suicune, it actually has some decent bulk. I've had success in the past with Substitute sets.
Also, why isn't anyone trying out rain or sun? I know that hail and sand are prevalent due to the permanent weather setters being present, but Sun now has things like Darmanitan and Chandelure, while rain got Tornadus. I, for one, plan on testing out both weather types soon :)