Well first, your movesets and EV spread... might need some work. If you don't mind, I have a few suggestions for such!
First, if you're a fan of running an offensive oriented Jellicent, I wouldn't recommend Rash. See. a Rash nature will lower your special defense in which, it would be perfectly be acceptable against some fragile pokemon that utilizes a Mixed set, like Salamence, but it would not be good for a Jellicent, or at least in this case, because you have no physical attacks - just special attacks. Plus, Jellicent is a pretty bulky pokemon in the long run. So, how about trying Modest instead? Plus, from the spread you're using, a Salac Berry won't help you outspeed much pokemon. See, if you have a 8 EV in Speed, you'll only be able to reach 158 speed, and, when Salac Berry has been activated, you'll only be hitting 237 speed, which is still not enough to outrun pokemon that has 100+ base speed like Infernape or Ninetales. So, what you can do is try using a Choice Specs instead, with at least 252 SpA. With that, along with a Modest nature, you'll be able to keep your overall bulk when you're attacking. Now, assuming you want to use a Choice Specs, you can utilize this moveset:
- Water Spout
- Shadow Ball
- Giga Drain / Ice Beam
- Ice Beam / Energy Ball
The whole idea with Choice Specs is to utilize Water Spout, in which, if you team up with a pokemon that can set up rain like Drizzle Politoad, Jellicent's Water Spout reaches an 337 Base Power, rivaling certain legendary pokemon's power! Between Water Spout and Shadow Ball, it is difficult to find a Pokemon that can stomach Jellicent's assaults.
Jellicent can utilize a secondary Water STAB attack to fall back on when its HP gets low. Surf is the most reliable option, while Hydro Pump is still powerful with choice specs, at the cost of accuracy. Scald can be used for the burn chance, but it is generally not preferred, as the lack of power seems counterproductive on a wallbreaking lure.
Ice Beam allows Jellicent to hit Dragonite, which can be very problematic if it is at full HP (due to Multiscale), Virizion, and other Grass-types for super effective damage. Giga Drain, on the other hand, deals 4x effective damage against Gastrodon, which is immune to Water Spout and has enough Special Defense to take on Shadow Ball and Recover off the damage; it also hits Vaporeon harder than Shadow Ball does.
Then again, I also recommend you try a defensive-oriented Jellicent, if you don't plan on using a rain dance team. It can be Bold Natured and have either a 248 HP / 216 Def / 44 Spe EV spread, or a 252 HP / 252 Def / 6 SpD spread. Normally, a defensive utility Jellicent has this moveset:
- Scald
- Will-O-Wisp
- Recover
- Taunt
Scald can be used to burn switch-in pokemon, or just a threat in general, like SD Scizor, CB Terrakion, Jirachi, etc, etc. Or, Will-O-Wisp can help ensure the burn if you don't want to rely on that 30% chance. Recover of course if for your survivability, and Taunt can cripple pokemon that are slower than you if you have at least 44 EVs in speed, including Slowbro, Politoad, Blissey, Vaporeon, Quagsire, and Hippowdon. Try it out if you want!
Moving on to your Maractus, Naughty isn't really good for it. Especially in OU. Try something like Timid, or Modest, or even Bold or Calm natured, because it won't be doing much sweeping in OU, even with a Sun team. If Lum Berry doesn't help you, try Leftovers instead. You can also utilize this moveset:
- Sucker Punch
- Spikes
- Giga Drain / Leech Seed
- Hidden Power Fire / Toxic
This set utilizes spikes for you and your team. Sucker Punch can be used against Lati@s, and you can either have Giga Drain or Leech Seed for switch-ins. There's also a choice between Hidden-Power Fire for possible Scizor switch-ins, or Toxic for non-steel or non-poison switching ins. As for your EV spead, I recommend having a 252 HP / 4 SpA / 252 Spe EV spread, or 252 HP / 252 Def / 4 SpA if you want to run it slightly defensive. Or, 252 HP / 4 SpA / 252 SpD if you want to have it as a special defensive pokemon.
Now for your Hydregion - it looks just fine, but, try having Draco Meteor over Flash Cannon, because with Choice Specs, Hydregion is more of a hit-and-run pokemon than a sweeper. And with Draco Meteor, and a modest-nature with choice specs, Hydregion has the potential to 2 Hit or 1 Hit KO almost any pokemon that is not a Steel type.
For your Slaking, try using a Choice Band over a Chople Berry. You'll be able to catch more OHKOs or 2HKOs that way, or just hit harder in general. You don't need Low Sweep if Earthquake will hit harder against certain pokemon anyway, and I recommend Return over Strength, because Return hits way harder. So, I'd recommend you try out this moveset:
- Return
- Earthquake
- Night Slash
- Retaliate / Pursuit / Giga Impact / Rock Slide
Return of course is your STAB move, Earthquake can hit those fire, steel, or rock types for you, Night slash is effective against ghost pokemon switch ins, and the last move can be a filler - retaliate can do nice damage if you've just lost a teammate, pursuit can hit pokemon that would want to switch out, and Giga Impact is there for big damage, but I don't advise doing it, as you won't be able to switch out next turn. Rock Slide can also be used to hit flying types.
Now for your Emolga, I wouldn't try a mixed set as there's not a lot of physical options for it, so, I'd say just sick to running special attack moves. Consider a Timid nature on it instead of Rash, because you'll be running 335 speed as opposed to 305 speed, to outspeed more pokemon. I also recommend a spread of 4 HP / 252 SpA / 252 Spe, or maybe 160 HP / 156 SpA / 192 Spe for less speed, but more bulk. As for your item, try Leftovers on it, instead of Electric Gem, because even with it, Emolga won't be making much OHKOs, plus, no one would leave something like a water pokemon against Emolga. Try out this moveset as well:
- Charge Beam
- Air Slash / Thunderbolt
- Substitute
- Roost / Encore / Hidden Power Grass
It's Emolga's best offensive set. The infamous Substitute + Charge Beam combination can make Emolga a fierce hard-hitter if played correctly. Air Slash or Thunderbolt is used for a more reliable and powerful STAB move than Charge Beam. Air Slash is the preferred move as it hits Grass-types and Emolga already has a Electric-type move in Charge Beam; with Thunderbolt, however, Emolga is able to deal massive damage. Roost keeps Emolga healthy, making it able to set up Substitute over and over again. Encore can lock the opponent into a resisted move, making setting up much easier for Emolga.
Finally, your Scolipede - I wouldn't recommend a Hardy nature because there is no benefits of a Hardy nature. Try a Jolly Nature with a EV spread of 4 HP / 252 Att / 252 Spe, because Scolipede does not have the sufficient bulk to take much hits in OU. So, you can have it a sweeper instead. Try this moveset for it:
- Swords Dance
- Megahorn
- Rock Slide
- Earthquake
This set utilizes Swords dance, in which after using Swords Dance, it reaches 558 Attack, and with enough speed to outspeed several Pokemon that it will come across, it is a pretty good sweeper. And, to be honest, it's far more efficient than the Toxic+Venoshock combo, just in case you are facing an opponent with a steel type. Earthquake can hit Fire/Steel pokemon, Megahorn is your STAB move, and Rock Slide can hit flying pokemon.
Now, as the basis of your team, it seems as though you're using a lot of NU/RU pokemon in OU, where there are better teammates that you can use in OU. For example, you can try Celebi > Maractus, and Heatran > Emolga. That way, you can have the bulky Grass + Water + Fire core. Also, Slaking is, to be honest, not really a great physical sweeper in OU, as opposed to certain pokemon like Haxorus, Infernape, Lucario, Salamence, and so on. The same can be said about Scolopede too; there are better SD users in OU, like Haxorus or Lucario, or even Gliscor.
So, what I advise you to do, is to try out a few more pokemon out, and see how they can benefit your team more. You can even branch out of the balance strategy, and maybe end up with a Offensive Rain team, or a Defensive Sandstorm team. *smogon.com link removed* has all of the OU pokemon in it, so you can see for your self what pokemon you can try out. You might be pleased!
In any case, I hope my advise helps! Good Luck on your battling~ ^^
