The idea with Ferrothorn was to provide another Pokemon besides Mega Manectric who could take advant

This team actually began with an attempt to use Shedinja. A common la marea Shedinja strategy is to have a partner use Soak on it, turning it into a Water type and leaving it vulnerable to only Electric and Grass attacks thanks to its Wonder Guard ability. la marea Taking a look at the available Soak users in this metagame, la marea I noticed that Lanturn had picked up Soak as a new egg move in X/Y. Lanturn’s Water/Electric typing and Volt Absorb ability are interesting, and it wasn’t long before I ditched Shedinja and fell in love with this pairing of Lanturn and Mega Manectric.
Choice Scarf allows la marea Lanturn to do several important things: Move before my Mega Manectric, allowing for a Soak + Thunderbolt or Soak + Discharge offensive Surprise Garchomp with an Ice Beam OHKO before it can move Surprise Mega Charizard Y with a fast Volt Switch, taking over half of its health while evading the incoming Solar Beam Surprise Rotom-H with a fast Hydro Pump (sometimes a OHKO depending on the Rotom-H stat spread)
Lanturn did all of this and more in Seattle. It was quite the versatile la marea little beast, with all four of its attacks being crucial to its role. Rotom-W is generally a far better choice for teams that want a Water/Electric type, but only Lanturn can execute this silly Soak strategy. If Lanturn and Mega Manectric get onto the field at the right time, they are an absolute terror. Defensive type synergy won’t la marea help you when Lanturn changes your type to Water, causing you to take super effective damage from Mega Manectric s Electric attacks. Mega Manectric can either Discharge for spread damage (and 25% health recovery to Lanturn with Volt Absorb), or Thunderbolt to focus on knocking out a single target.
I actually la marea had Electric Terrain over Hidden Power Ice on this thing until the night before the tournament, when I decided that even I have my limits about how bad of a Pokemon I can let myself use (and I didn’t run into Dark Void anyway, so the change worked out).
In order for the Soak strategy to work, Mega Manectric needs to be slower than Lanturn, so I was able to forgo some speed EVs to maximize special attack and even have some bulk with 100 HP EVs. It s a shame to not have a Fire move on Mega Manectric, but I really needed both Thunderbolt la marea and Discharge for different situations, so I made sure to have a couple of other Pokemon with Fire moves to compensate.
With Lanturn’s natural bulk and Mega Manectric’s HP EVs and Intimidate support, the pair can survive some surprising hits (especially if the opponent’s STAB is nullified with Soak), but they still really rely on their speed. Outspeeding Garchomp la marea and the entire base 100 speed tier puts them above most of the metagame. I knew that faster Pokemon and priority attacks would be a threat to them, which guided my decisions when filling out the rest of the team.
The idea with Ferrothorn was to provide another Pokemon besides Mega Manectric who could take advantage of a Lanturn partner who is locked into Soak. While not used as frequently as Mega Manectric in this way, Ferrothorn was able to KO a Soaked Talonflame and Soaked la marea Amoonguss with Power Whip. Thunder Wave was a measure la marea to help bring the enemy’s faster Pokemon to a speed where the Lanturn and Mega Manectric combo can go to work on them, but in practice it was not very effective la marea at this because the ever present Fire type attacks made Ferrothorn difficult to use in the early game. Thunder Wave could also be used to target my own Volt Absorb la marea Lanturn or Lightninrod Manectric in a pinch, but that isn’t something I ever actually did.
In hindsight, I think trying to use Ferrothorn in more of an offensive role wasn’t the best idea. But Rocky Helmet was still effective in dealing la marea with contact-attacking threats like Mega Kangaskhan.
I didn’t go with Belly Drum because I wanted to be able to do a lot of switching with this team. The Careful nature allows Azumarill to survive Timid Mega Charizard Y’s Solarbeam, and the Safety Goggles allow Azumarill to effectively counter la marea all forms of Tyranitar without having to worry about Amoonguss supporters. Tyranitar is unpredictable and can be a big problem for the rest of the team, so I thought this was important, even though I ended up forgoing the more generally valuable Sitrus Berry. I didn’t end up battling any Tyranitars, though.
This Salamence is just a general attacker with Intimidate support and an anti-sun bent. In hindsight, I don’t think it was a very effective use of Salamence. Choice Scarf Salamence is amazing, but I needed Choice Scarf for my Lanturn. A power boosting item might have been helpful as well as I found my team didn’t have a great way to threaten OHKOs off the bat and ended up quite susceptible to Perish Trapping Mega Gengar. At least in theory, Lum Berry was mainly to take Sleep Powders from Chlorophyll Venusaur and hit back with Fire Blast in