Alright i've played a little bit on the ladder to test out some Froslass teams/Jolteon, and here are some initial thoughts that i have for you guys at the moment:
1) Jolteon is pretty good imo. I really don't understand the people who thought it'd be underwhelming and/or outclassed by Heliolisk, because to be honest i've been having a blast using this thing and it always pulls its weight. That base 130 Speed stat as mentioned before is really nice, letting it outspeed pretty much the entire unboosted metagame as well as all boosted Pokemon below base 70 Speed (so stuff like Choice Scarf Emboar and Magneton get outsped as well). Between that, Volt Switch, and the power of a Choice Specs/Life Orb boosted Thunderbolt, i often find that Jolteon can quite literally run circles around the opposing team, especially other offensive teams that might not be well prepared to take on such fast and powerful Thunderbolts (the fact that i'm currently using it on Froslass offense makes Jolteon even scarier, as its speed forces a ton of switches and racks up entry hazards damage fast, not to mention the spikes make it really easy to clean up afterwards with Thunderbolt). Volt Absorb is pretty situational, but definitely has its uses imo, letting Jolteon absorb Electric-type moves from things such as Other Jolteon, Rotom-C, and Heliolisk with a bit of prediction, completely blocking attempted Volt Switches and gaining 25% hp in the process. As for the exact set i use, i use neither "standard" hidden power for Electric-types in the form of Ice or Grass, instead i use
Hidden Power Water. This leaves you more vulnerable to Gastrodon and the rare Lanturn, but otherwise it hits two important targets in the form of Rhyperior and Gligar at the same time, 2HKOing both of them with Stealth Rock damage, something neither Hp ice nor hp grass can do. As for the final move, i run
Signal Beam, which lets me hit at least a few of the pesky Grass-types that resist Electric/Water coverage super effectively while hitting Druddigon for about ~35%, which might not seem like much, but between hazards and repeated volt switching residual damage can add up fast. full set below:
Jolteon @ Life Orb
Ability: Volt Absorb
EVs: 4 Def / 252 SAtk / 252 Spd
Timid Nature
- Thunderbolt
- Hidden Power [Water]
- Signal Beam
- Volt Switch
2) if you're using Froslass offense without Sharpedo, you're doing it wrong imo. Sharpedo is so stupidly good when paired with the spikes support of Froslass it isn't even funny imo. Because of Sharpedo's Speed Boost ability, it becomes nearly impossible to revenge kill once it gets going without priority moves, turning it into an excellent late game cleaner. The problem with Sharpedo though is that because of its incredibly low defenses it absolutely needs to kill everything in one hit to pull off a successful sweep, and if it doesn't it ends up dying on the spot: this is where Froslass's hazard support comes in. If Froslass can stack a few layers of Spikes against the opposing team, it becomes significantly easier for Sharpedo to score these KOs instead of just barely coming up short in damage output vs bulkier opponents, making it pretty much unstoppable in the end game. Additionally, If you keep Froslass around to be more than just a lead, its Ice Beam and Destiny Bond can come in handy against popular Sharpedo checks too, such as Tangrowth and Virizion.
TL;DR Jolteon is pretty good imo at least at this stage of the metagame, and people should really be pairing Froslass and Sharpedo, they work together beautifully.