Has anyone tried full weather teams? I've run into very few of them which I find interesting because leading up to Gen 9 I thought weather would be a lot more common, since most Gen 8 setters are present aside from the Ninetales lines. I reckon it's due to the limited number of weather abusers we have due to the dex cut, as well as a bunch of moves being cut (RIP Flip Turn Barraskewda)
So far the only one I've tried out a bunch is sun
Torkoal is honestly surprisingly good. Being able to compress spinning, weather setting and being a decent physical tank is pretty nice, though it gets worn down really quickly (Why doesn't this get Slack Off man). I've mostly been running Rocks Spin Lava Plume Yawn, though Wisp is also a cool option
The selection of Chlorophyll users available right now is not that great. Scovillain is probably the best of the bunch, with STAB Fire moves boosted by sun, as well as the option to go mixed thanks to its equal Attack and Special Attack stats. It also has decent coverage, though does sort of need LO to really smash it's way through walls which combined with its Fire type makes it really prone to getting worn down. That said, its STAB combination is really good and adding on Stomping Tantrum, almost nothing can safely switch in to this thing.
252+ SpA Scovillain Fire Blast vs. 252 HP / 252+ SpD Clodsire in Sun: 187-222 (40.3 - 47.8%) -- guaranteed 3HKO
252+ SpA Life Orb Scovillain Fire Blast vs. 252 HP / 252+ SpD Clodsire in Sun: 243-289 (52.3 - 62.2%) -- 98.8% chance to 2HKO after Leftovers recovery
0 Atk Life Orb Scovillain Stomping Tantrum vs. 252 HP / 0 Def Clodsire: 226-268 (48.7 - 57.7%) -- 47.7% chance to 2HKO after Leftovers recovery
Leafon is kinda cool,
I talked about it before. It is all in all a worse Scovillain, however it can nab some nice surprise KOs with Terablast Fire. Being pure grass also means it can check Palafin - though this seems like it wont be a neccesity soon. It's more easily walled than Scovillain even with Tera Fire, due to it losing Knock Off this gen meaning it cannot touch Skeledirge or Dragapult at all :(
Lilligant seems like the third best chlorophyll user but at this point you're just looking for the ability and not for actually useful mons. Sleep Powder QD is cool though, and again it can Tera Fire or something else for coverage.
Fire spammers are also something to consider for Sun teams. There's not a whole lot of them this gen though, and theres 2 fully evolved mons that get eruption, so that's a shame. One of these mons is Torkoal btw, the other one is Camerupt. The best one is definitely Chi-Yu because, well...
252 SpA Choice Specs Fire Tera Type Chi-Yu Fire Blast vs. 252 HP / 0 SpD Blissey in Sun: 428-504 (59.9 - 70.5%) -- guaranteed 2HKO
...Yeah Specs is really, really strong. It can afford to go Specs on sun teams since there's other ways of speed control. Also a good switchin to Gholdengo.
Haven't tried out Ceruledge, Iron Moth, or Rotom-Heat yet on sun but on paper they look good. Iron Moth can run Agility Fiery Dance to clean up weakened teams - Though when I've faced it, it seems a bit underwhelming. Ceruledge is probably the best physical fire mon but it's reliance on Sash or Weakness Policy is problematic on an archetype that has some trouble with hazards. Rotom Heat is a sun abuser that also provides a ground immunity which is very nice, though it only gets Overheat so it's not a good sweeper, but more of a utility mon.
There might be others but honestly just run Chi Yu it's cracked as fuck under sun.
Sun got an unfair amount of new toys this gen compared to other weathers: the paradox mons. Not all of these fit well on sun teams though. Great Tusk is fantastic, being a sun abuser that can also spin hazards is absolutely incredible, and under sun it hits like a freight train. Slither Wing is excellent speed control with a massive First Impression, as well as STAB CC, Fire Boosted Flare Blitz (Or even flame charge) and utility options with WoW, U-turn and Morning Sun. Some others have talked about Sandy Shocks before me but I've been running a Specs set which hits incredibly hard. It also gets rocks and spikes. Roaring Moon is fine on sun, but honestly it's a bit of an awkward fit. At least I haven't managed to get a build together that fits Moon. Finally Bonnet and Scream Tail are a bit underwhelming on sun but that's got less to do with sun and more to do with the mons themselves. Though I might give Scream Tail another go, it does have some good wishpassing capabilities.
These 2 mons aren't specifically sun related but I want to mention them anyway. Garchomp is still Garchomp, it's typing is incredible, it can benefit from sun to hit Corviknight hard, or provide a pivot with rocks for it's team. It even gets spikes this gen. Hatterene is honestly, surprisingly nice. I've been running Air Balloon and it completely blanks the common Clodsire sets, Garchomp sets that only run STABs, trades with Glimmora without risking hazards being set, and some other cool stuff like being an emergency switch in to taunt, spore, fighting moves and other stuff. Mystical fire is also boosted by sun which can nab some nice OHKOs on random (steel) mons that don't expect it.
Overall sun is quite cool, but rn is held back by the heavy presence of Bundle and Palafin. It does decently well into Offense teams, though needs some careful positioning around certain mons like Quaquaval, Great Tusk, Chi-Yu, and others. I'm looking forward to running this in a meta without palafin or bundle (assuming they get banned which seems rather likely as of right now)