Jolteon seems like a pretty interesting choice for Double Hall. I think I thought about using it at some point after using Kingdras for Double Hall, but probably ended up writting it off due to not really coming up with a good way to deal with:
H439 | Regice | Quiet | Sitrus Berry | Blizzard | Avalanche | Hyper Beam | Thunder Wave | Atk/SpA
Since it just tanks Discharges like a champ, and survives 2 Specs Thunderbolts, barring criticals, due to Sitrus. Regice also has a decent chance at 2HKOing Jolteon with Blizzards
I've been having some pretty bad luck with playing Double Castle so far. Well, more like I can't go 100 battles without overlooking something in preparation. But it's pretty silly how the moment I screw up preparation is also the moment the CPU decide to put Murphy's Law into overdrive. I usually end up needing a turn to get back into control of the battle when I screw up, except that their Quick Claws, Flinching, and Critical Hits have gone 4 for 4 in killing me during that one turn opening.
Just another rainy day on the train...
VGCS Jaunary International, 165W-30L-27D/C, 1873
, 13th Place
VGC 2013 Winter Regional, Salem OR, 1st Place