Swampert @ Sitrus Berry / Ground Gem / Rindo Berry
Trait: Torrent
EVs: 252 HP / 252 Atk / 4 Spe
Adamant/Brave Nature
- Earthquake
- Waterfall
- Wide Guard
- Rock Slide / Ice Beam / Protect
Initially, I was using Swampert on a hail team in order to beat Steel types that resisted Blizzard while also getting a Water attack. While many people would use Gastrodon for the job, I wanted something a bit more unique. At first glance there's little reason to use Swampert instead, since the added security against Rain would outweight a bit more physical attacking prowess. However, Swampert has an amazing support move in Wide Guard, which lets it help support the team by deflecting common spread moves. This was especially useful on a hail team since Abomasnow and common hail abusers were weak to spread moves such as Heat Wave and Rock Slide. Swampert also has some great offensive typing which lets it pull its own weight outside of just Wide Guard support. While most people would use Hitmontop as their Wide Guarder, Swampert has niches in its good bulk and great typing, as well as the fact that it is capable of taking common attacks such as Heat Wave and Blizzard even w/o
Wide Guard, and also grants a valuable Electric immunity.Earthquake and Waterfall act as the main STABs, and Wide Guard helps it maintain its support niche. In the last slot, Rock Slide and Ice Beam are both good options to hit things not hit very hard by the STABs, with Rock Slide giving spread damage while Ice Beam gets a stronger hit on Dragons. Swampert also has Blizzard if you're using it on a Hail team. Protect is just a nice staple option, but it does go on the same counter as Wide Guard, so watch out for that. Swampert does have its faults though. It won't like taking any superpowerful physical hits, so Intimidate support would be useful to help it stick around longer. Also, it won't be beating any Grass types on its own, so partners like
Volcarona and Abomasnow that can defeat them and also appreciate the support Swampert gives make for great partners. Sitrus Berry makes a great item choice to let Swampert stick around a bit longer. Ground Gem gives Earthquake a nice one time power boost. Rindo Berry lets it live through a Grass type hit, but more powerful ones can still potentially KO it, and most will leave it too low health to be too useful anyways.
tl;dr Swampert's a cool mon so use it more guys.
I like the prospect of Swampert, but I really don't know how it's going to find a niche here other than Wide Guarding with Gastrodon around doing essentially the same thing. I know Swagger + Lum Swampert ended up getting 2nd at worlds in the Seniors division in VGC, but even that is hard to get going consistently. It is definitely viable and has a good utility use, but the fact that Gastrodon exists and Swampert is phased by Intimidate don't aid its case too much. It pairs well with Volcarona though, I'll give you that for sure.
Of anything here, the set/spread you provided was the most concerning part of this. The EV spread isn't based on any calculations (I didn't see anything it did with that spread mentioned) and its items aren't explained in terms of how it benefits from them. What does Ground Gem allow it to do that it couldn't otherwise? What would Sitrus Berry provide in terms of bulk that it wouldn't get without it? What OHKOs would Rindo prevent? Give a few quick calcs against commonly used mons just to show that it could stand its own in the metagame. Also, tweak the spread so that it uses EVs more efficiently. Your item and your spread work together to give you success with your set!
Here's something I'd recommend if you're using Swampert. I don't know a lot of common sets on the legendaries that are not allowed in VGC yet, so I need to touch up on those (especially Skymin, Genesect, and Kyurem-B), but I'll use some still very common other mons here.
Swampert @
Sitrus Berry / Ground Gem / Rindo Berry
Trait: Torrent
EVs:
252 HP / 252 Atk / 4 Spe 252HP / 116ATK / 4DEF / 84SDEF / 52SPE
Adamant/
Brave Nature
- Earthquake
- Waterfall
- Wide Guard
/ Protect
-
Rock Slide / Ice Beam / Protect Ice Punch
Ironically, 252hp and 4sdef with a Rindo Berry allows you to survive all 252/Modest +1 Ludicolo Giga Drains (in case you see someone running wide guard bait version of bog rain.) However, it would be safe to invest 252 in HP and 84 in SDef so you can take all Latios Dragon Gem Draco Meteors. Defensively, simply 4 EVs with 252HP allows you to take all Fighting Gem Gallade Close Combats. 52 EVs in Speed allow you to speed creep 4 Speed EV Scizor (commonly used in Singles, and apparently people don't know yet that it's very overrated in doubles >_> so you have to check it.)
Putting the remaining 116 EVs in attack along with making Swampert Adamant allows it to 2HKO bulky Tyranitar (252HP / 36DEF) with Waterfall. Ice Beam and Rock Slide are not optimal here.
Stone Edge misses too often to be good in a best of 1-style format. Ice Punch outclasses Ice Beam far and away on Swampert, not sure why that was not brought up right away here since Ice Beam is 1) weaker in general on Swampert with its much lesser special attack and 2) weakened even more by an Adamant nature (which is needed for EQ or Waterfall to do anything). Icy Wind is okay for support, but you better damn well hope you don't forget to not use it against a team with Tornadus or Bisharp, or you are DONE. Protect and Wide Guard can't be used turn after turn, so pick one or the other depending on your team's needs.