Crimson Colossus

[Blue Jay]

Crimson ● Colossus​

​

Introduction
For a few months now I’ve been lurking around the forums, learning what I could from reading the posts of experienced Uber players, RMTs, threads discussing team building or unconventional Pokemon sets... anything I could find, really, and trying Pokemon and sets discussed for myself. More recently I’ve also begun to contribute to the forums myself, as I began to feel knowledgeable enough to contribute meaningfully.

Now, after some experimentation around different playstyles and different cores, I would like to share one of my best teams and the one that has had most success on the ladder so far. It is currently ranked 15th on the PS ladder, with an ACRE of 2133 and a win-loss ratio of 98-14-1.

Team Building Process
This team was built around Rock Polish Groudon, a lategame sweeper that often devastates offensive teams where Pokemon are frail and virtually nothing can outspeed it at +2.

I chose to pair it with Extremekiller Arceus, for its excellent sweeping power, revenge killing utility and offensive synergy with Groudon.

At this point it was apparent that the team would be inclined towards hyper offense, and Groudon really appreciates multiple hazards, as its attacks are not particularly powerful, so I chose Deoxys-S.

At this point the team needed a solid Extremekiller check, a spinblocker, a Kyogre switch in, a wallbreaker and a Scarf Pokemon. Giratina-O was chosen for its ability to fulfill the first two roles while Latios provided a bulky Water-resist and wallbreaking power.

At this point CM Arceus-Ghost posed an enormous threat and I lacked a Scarf Pokemon, so in the absence of a spinner/magic bounce Pokemon a Scarf Darkrai (as suggested by Hack He Must) seemed the best option.

After initial playtesting, a major flaw quickly became apparent: three Pokemon were weak to Ice, and only Arceus (which I preferred to save for the late game) could comfortably switch in on it. Scarf Darkrai also seemed only a shadow of its other sets and accomplished little in most games. I considered different options and versions of the team, consulting more experienced players such as Hack He Must, Sweep and Anikrahman1995, finally opting for a Scarf Kyogre in Darkrai’s place as Sweep suggested.

The Team in Detail

Deoxys-Speed @ Focus Sash
Trait: Pressure
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Stealth Rock
- Spikes
- Taunt
- Fire Punch

Deoxys-S was chosen for its reliability in setting entry hazards early in the game, often succeeding in setting multiple layers. Both of this team’s sweepers are not particularly powerful by Uber standards, so entry hazards are crucial to its success. Taunt prevents opposing leads from using Deoxys-S to set up, while Fire Punch is mainly for Genesect. The EVs are simple; max Speed allows it to outspeed everything up to and including Scarf Garchomp, while the Attack EVs almost guarantee a OHKO on Genesect with Fire Punch.

Kyogre @ Choice Scarf
Trait: Drizzle
EVs: 64 HP / 252 SAtk / 192 Spd
Modest Nature
- Water Spout
- Surf
- Thunder
- Ice Beam

Kyogre may have been the last addition, but by no means the least. Besides fulfilling the obligatory revenge killer role, it provides defensive synergy in the form of an Ice resist and has more bulk to do so than Genesect would. Furthermore, it provides dual weather alongside Groudon, which troubles a lot of weather teams while all Pokemon other than Kyogre on my team function just as well in any weather. It even manages to clean up weakened teams lategame at times. The moveset is standard; Water Spout and Surf capitalize on the power of rain-boosted STAB, while Thunder and Ice Beam provide coverage on any resists. The EVs allow it to outspeed Mewtwo, with the remainder invested in bulk. The additional power of a Modest nature is far more valuable to this team than gambling with speed ties against other Scarf Pokemon or outspeeding Deoxys-A.

Giratina-Origin @ Griseous Orb
Trait: Levitate
EVs: 220 Atk / 248 Def / 40 Spd
Adamant Nature
- Shadow Sneak
- Dragon Tail
- Will-O-Wisp
- Magic Coat

Giratina-O is a behemoth of utility. In addition to being the necessary spinblocker and Extremekiller Arceus check, with Magic Coat it serves as an excellent anti-lead for Pokemon that beat Deoxys-S (Custap Forretress, opposing Deoxys-S, Thundurus-I) and prevents spinners setting up hazards on it or wearing it down with status. Dragon Tail allows it to take advantage of the switches it forces and the entry hazards, while also being the best option to handle Extremekiller Arceus. Will-o-Wisp cripples physical attackers and is also great for Arceus that have yet to set up. Shadow Sneak is excellent for helping to check a variety of threats while also being necessary for anti-leading Deoxys-S. The Defense EVs are just enough to survive a +2 Life Orb Extremekiller Shadow Claw after SR, allowing it to quite easily check Silk Scarf/Lum Berry variants. The remaining EVs are speed creep on other base 90 Pokemon and maximize the power of its attacks.

Latios (M) @ Soul Dew
Trait: Levitate
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature
- Draco Meteor
- Psyshock
- Grass Knot
- Roar

Latios is the wallbreaker of the team and helps to check opposing Kyogre. Barely anything comfortably takes a Draco Meteor, and even a -2 Draco Meteor will OHKO offensive dragons and deal good damage to most Pokemon. Psyshock is for secondary STAB and helps to check Ho-Oh, Calm Mind sweepers and Chansey/Blissey. Grass Knot is primarily for nailing Kyogre without a weather reliant move, although it also OHKOs Groudon and deals good damage to Tyranitar. Roar may be unconventional, but prevents any set up attempts on a weakened Latios and pairs nicely with entry hazards. The EVs are standard, maximizing speed and power.

Groudon @ Life Orb
Trait: Drought
EVs: 80 HP / 252 Atk / 176 Spd
Adamant Nature
- Earthquake
- Stone Edge
- Dragon Claw
- Rock Polish

Groudon is the focus of this team, as Hack impressed unto me the devastation this set can cause (mainly to offensive teams). After a turn of set up, revenge killing it is almost impossible, as it has good physical bulk against priority and outspeeds all common Scarf Pokemon after a boost. More than anything, though, its strength lies in the element of surprise; most Groudon pose little offensive threat and many that do are slow, so people are rarely prepared for a powerful, fast Groudon. Earthquake is STAB and its preferred move, OHKOing many offensive threats that do not resist it. Stone Edge gives excellent coverage alongside Earthquake, most importantly hitting Lugia hard if Multiscale is broken. Dragon Claw is necessary coverage for levitating Dragon types. The EV spread and Life Orb maximize its offensive potential, as with no way to boost its Attack it absolutely needs both to secure many OHKOs. The speed EVs allow it to outspeed it even Scarf Terrakion, and leftover EVs are invested in bulk to help it set up.

Arceus @ Silk Scarf
Trait: Multitype
EVs: 200 HP / 252 Atk / 56 Spd
Adamant Nature
- ExtremeSpeed
- Shadow Claw
- Brick Break
- Swords Dance

Arceus hardly needs much explanation, everyone knows how it works. It was chosen for the many chekcs they share; checking Groudon or Arceus often leaves opposing Giratina, Groudon, Giratina-O or Lugia so weakened that they may no longer check the other sweeper. I use Brick Break over Earthquake to deal better damage to Ferrothorn and opposing Extremekiller Arceus. The EVs make the most of its mediocre Attack stat, while allowing it to outspeed Adamant Rayquaza and still have excellent bulk to set up on. I chose Silk Scarf over Lum Berry despite often having multiple hazards as I appreciate its ability to pick off offensive threats without setting up

Threats

Arceus-Ghost nails my whole team with Judgment/Focus Blast and is difficult to KO due to its reliable recovery and bulk. I can usually pressure it offensively and then finish it off with Scarf Kyogre or Giratina-O, but it always leaves a mark on my team.

Few of my Pokemon can break Lugia without setting up, even after SR, and if it manages to sub it becomes very difficult to handle. Roar on Latios helps, and fortunately Lugia cannot switch in too much, as Scarf Kyogre, +2 Groudon and +2 Arceus all threaten it, but if played well it troubles the team a lot, especially Thunder Wave variants.

U-Turn is an excellent move, and only Giratina-O comfortably switches into a U-Turn from Genesect. As I prefer to conserve my Giratina-O until the opponent’s Arceus forme is revealed (and dealt with in the case of Extremekiller Arceus), Genesect often wears down my team significantly, despite getting few opportunities to switch in.

Giratina-O is very versatile and therefore unpredictable, and without a steel type nothing wants to switch in against it. It can also cripple one of my physical sweepers, although its usual lack of recovery means that after it has checked one threat it can no longer check the other. Rather than posing a major offensive threat, it is generally just troublesome.

My team is very reliant on having at least Stealth Rock on the opposing field, as both my sweepers need it for many of their OHKOs and Lugia becomes an unbreakable wall in its absence. Ho-Oh also becomes a far greater threat without it. Of the two, Xatu is usually more troublesome, as it cannot be worn down as Espeon can.

Credits
Sweep and Hack He Must deserve special mention for helping me build the team, as well as inspiring myself and others with their teambuilding and battling prowess. Anikrahman1995 was to my knowledge the first to use Roar on Latios and also helped to create a very different version of this team, although this version turned out to be my favourite. Additional thanks to Hack for helping me with this RMT and to the Ubers community as a whole for providing a wealth of information to help newer players succeed in competitive Pokemon.

Importable

Deoxys-Speed @ Focus Sash
Trait: Pressure
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Stealth Rock
- Spikes
- Taunt
- Fire Punch

Kyogre @ Choice Scarf
Trait: Drizzle
EVs: 60 HP / 252 SAtk / 196 Spd
Modest Nature
IVs: 30 Atk / 30 SAtk / 30 Spd
- Water Spout
- Surf
- Thunder
- Ice Beam

Giratina-Origin @ Griseous Orb
Trait: Levitate
EVs: 220 Atk / 248 Def / 40 Spd
Adamant Nature
- Shadow Sneak
- Dragon Tail
- Will-O-Wisp
- Magic Coat

Latios (M) @ Soul Dew
Trait: Levitate
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature
IVs: 30 Atk / 30 SAtk / 30 Spd
- Draco Meteor
- Psyshock
- Grass Knot
- Roar

Groudon @ Life Orb
Trait: Drought
EVs: 80 HP / 252 Atk / 176 Spd
Adamant Nature
- Earthquake
- Stone Edge
- Dragon Claw
- Rock Polish

Arceus @ Silk Scarf
Trait: Multitype
EVs: 200 HP / 252 Atk / 56 Spd
Adamant Nature
- ExtremeSpeed
- Shadow Claw
- Brick Break
- Swords Dance

Thanks for reading! Any feedback to help improve the team is greatly appreciated. :)

 

[Sweep]

Hi! Very nice team, but Scarf Zekrom is a pressing issue as nothing (not even Groudon really) can switch in safely on it. As you pointed out, CM Ghostceus is also an issue. I wonder if Max HP Grass Arceus with Thunder Wave + Roar would help with these threats? You lose out on priority but gain a solid switchin on those threats, as well as Palkia and Kyogre. +1 252 Ghostceus does ~ 50% on average vs. standard Grassceus so you can switch in at it uses Calm Mind, cripple it, and spam Recover until your opponent is paralyzed. At this point, you can Roar it out! Its Judgment/Grass Knot still hits fairly hard even without investment and it synergizes well with your team. Roar also complements the hazards Deoxys-S sets as well. Grassceus does make you a little weaker to Shaymin-S and Scarf Reshiram but I'd rather be weaker to those mons than Zekrom or CM Ghostceus. Unfortunately, neither Grassceus nor Groudon can switch into Adamant Zekrom's Outrage:

252+ Atk Zekrom Outrage vs. 252 HP / 0 Def Arceus-Grass: 204-241 (45.94 - 54.27%) -- guaranteed 2HKO after Stealth Rock

252+ Atk Zekrom Outrage vs. 80 HP / 0 Def Groudon: 178-211 (49.3 - 58.44%) -- guaranteed 2HKO after Stealth Rock

So you will have to play around it a little bit. Good luck!

 

[cfdu1202]

Hi there! I actually have a similar team, that I've used several months ago, and I was wondering if I would write a rmt anout it. Instead my team was based around RP Groudon + SD Arceus-Ghost, because I've found out that Giratina-O and Lugia are very hard to take down with Groudon + Normal Arceus. Arceus-Ghost > Extremekiller has solved a lot of problem. You can keep Extremespeed on Arceus-Ghost without any problem, as after a SD Espeed is strong enough.

As Lugia isn't that common nowadays, I suggest Fire Punch > Stone Edge on Groudon. Currently opposing Arceus-Grass has a field day against your team, and so does Skarmory (Kyogre does threaten it, but it's the only pokemon). Sure, it cannot do anything to Giratina either, but assuming you switch in, Skarmory has already set up one layer of spikes. Walling both of your sweepers isn't a good thing.

Beware of Life Orb Dialga, and to a lesser extent Outrages from the like of Rayquaza or Zekrom. You have no safe switch in.

That's a great offensive team

 

[Blue Jay]

Hi! Very nice team, but Scarf Zekrom is a pressing issue as nothing (not even Groudon really) can switch in safely on it. As you pointed out, CM Ghostceus is also an issue. I wonder if Max HP Grass Arceus with Thunder Wave + Roar would help with these threats? You lose out on priority but gain a solid switchin on those threats, as well as Palkia and Kyogre. +1 252 Ghostceus does ~ 50% on average vs. standard Grassceus so you can switch in at it uses Calm Mind, cripple it, and spam Recover until your opponent is paralyzed. At this point, you can Roar it out! Its Judgment/Grass Knot still hits fairly hard even without investment and it synergizes well with your team. Roar also complements the hazards Deoxys-S sets as well. Grassceus does make you a little weaker to Shaymin-S and Scarf Reshiram but I'd rather be weaker to those mons than Zekrom or CM Ghostceus. Unfortunately, neither Grassceus nor Groudon can switch into Adamant Zekrom's Outrage:

252+ Atk Zekrom Outrage vs. 252 HP / 0 Def Arceus-Grass: 204-241 (45.94 - 54.27%) -- guaranteed 2HKO after Stealth Rock

252+ Atk Zekrom Outrage vs. 80 HP / 0 Def Groudon: 178-211 (49.3 - 58.44%) -- guaranteed 2HKO after Stealth Rock

So you will have to play around it a little bit. Good luck!

Hey Sweep! Thanks for the rate!

Scarf Zekrom is indeed impossible for my team to switch into, and I considered mentioning it in the threatlist (it has been about as troublesome as Giratina-O, so this would be justified). However, Scarf Zekrom has not been a major problem as of yet, for simple reasons: it cannot afford to lock itself into Bolt Strike, as this allows Groudon to set up completely unhindered, and Outrage prevents it from switching out. A Zekrom that could hit and run could be quite devastating, but as Outrage locks it in, it usually becomes set up fodder for my Groudon or Arceus after something has died, and then cannot avoid a OHKO as it cannot switch out. Of course, being able to force me to use one of my sweepers earlier than I might have intended (as well as usually getting a kill) can be troublesome.

Arceus-Grass would definitely help with Zekrom and Arceus-Ghost, although I fear it would also compound the already existing Lugia/Genesect weakness (as well as Arceus' priority being a great . I also fear that the compromise of power will give me trouble with stall, which can already be difficult at times (although Giratina-O and Latios help a ton). I shall experiment with it though.

Hi there! I actually have a similar team, that I've used several months ago, and I was wondering if I would write a rmt anout it. Instead my team was based around RP Groudon + SD Arceus-Ghost, because I've found out that Giratina-O and Lugia are very hard to take down with Groudon + Normal Arceus. Arceus-Ghost > Extremekiller has solved a lot of problem. You can keep Extremespeed on Arceus-Ghost without any problem, as after a SD Espeed is strong enough.

As Lugia isn't that common nowadays, I suggest Fire Punch > Stone Edge on Groudon. Currently opposing Arceus-Grass has a field day against your team, and so does Skarmory (Kyogre does threaten it, but it's the only pokemon). Sure, it cannot do anything to Giratina either, but assuming you switch in, Skarmory has already set up one layer of spikes. Walling both of your sweepers isn't a good thing.

Beware of Life Orb Dialga, and to a lesser extent Outrages from the like of Rayquaza or Zekrom. You have no safe switch in.

That's a great offensive team

Thanks for the rate!

SD Arceus-Ghost definitely sounds like an interesting option to consider and would have the additional benefit of giving me a U-Turn switch-in. It would give my team a significant Darkrai weakness, but perhaps its benefits could compensate for that.

I have definitely run into more Lugia than Arceus-Grass or Skarmory. That being said, your point about Arceus-Grass is entirely valid, so Fire Punch is definitely worth considering.

Dialga that are faster than Groudon and hit hard are indeed problematic, but fortunately quite rare. Outrages are unpleasant, but as they lock themselves in they often end up accomplishing little more than a 1-for-1 trade.

 

[Furai]

hi blue jay really cool HO team

soo firstly i think that you are doing the groudon/ekiller core a bit wrong. the point is mainly to lure giratinas and such and weaken them for ekiller. the best set for groudon to use is double dance @ lum berry, which allows groudon to beat all of them with a +2 earthquake or dragon claw. running a bit more bulk might be useful versus zekrom. feel free to keep dragon claw as your coverage move; lugia won't be as troublesome if you change ekiller to the sd ghost arceus, as suggested, but only with shadow force / shadow claw / brick break / sd. this set is the most efficient sd ghost arceus as it makes use of its best quality: strongest shadow force in the game when boosted. shadow force will also help you phaze out the foe, stacking up more damage on it. all of your threats are no longer safe. kyogre should use 52 hp / 252 spa / 204 spe as its spread to outspeed neutral deo-a.

from this point on the changes will be optionary. i believe that 2 ghosts on this kind of team is fairly redundant, and the dd rayquaza weakness is quite prominent. i think that scarf terrak > tina-o might be suitable, with choice specs replacing kyogre's scarf. this way you still cover the threats needed while still have something to nuke stall teams with and breach them. i guess you can only test and find out if this works for you

good luck!!

 

[Blue Jay]

hi blue jay really cool HO team

soo firstly i think that you are doing the groudon/ekiller core a bit wrong. the point is mainly to lure giratinas and such and weaken them for ekiller. the best set for groudon to use is double dance @ lum berry, which allows groudon to beat all of them with a +2 earthquake or dragon claw. running a bit more bulk might be useful versus zekrom. feel free to keep dragon claw as your coverage move; lugia won't be as troublesome if you change ekiller to the sd ghost arceus, as suggested, but only with shadow force / shadow claw / brick break / sd. this set is the most efficient sd ghost arceus as it makes use of its best quality: strongest shadow force in the game when boosted. shadow force will also help you phaze out the foe, stacking up more damage on it. all of your threats are no longer safe. kyogre should use 52 hp / 252 spa / 204 spe as its spread to outspeed neutral deo-a.

from this point on the changes will be optionary. i believe that 2 ghosts on this kind of team is fairly redundant, and the dd rayquaza weakness is quite prominent. i think that scarf terrak > tina-o might be suitable, with choice specs replacing kyogre's scarf. this way you still cover the threats needed while still have something to nuke stall teams with and breach them. i guess you can only test and find out if this works for you

good luck!!

Hey Furai, thanks for your feedback!

I am aware that the usual pairing is double dance Groudon to clear the way for Ekiller to sweep. However, I wanted to build a team around that RP Groudon set (although not necessarily in a central role) and the rest of the team emerged in the process. I have had my fun with RP Groudon though and may change to a double dancer, as I understand the advantages. That Arceus-Ghost set sounds interesting. I was also aware of the possibility of outspeeding neutral Deoxys-A, but I believe most are not neutral and would not like to risk my Kyogre on the hope that it may outspeed Deoxys-A (even if I change the team, I should have at least one priority user to help deal with it).

I shall give your version of the team a try and see how I like it. Again, thanks!

 

[Hack]

I agree with Furai on the double dance Groudon part (I was gonna suggest that lol... he owned me). Breaking down Giratina is of course something to aim for, and Lum Berry provides set up opportunities on Darkrai as well. I don't agree at all with the suggestions of SD Arceus-Ghost... It is simply lacking and just because you can hit the uncommon Lugia harder doesn't mean anything when you lose out on the priority on the team (as you have to change Giratina-o for something else as two ghosts are far too Darkrai weak).

To hit Lugia harder, you could try Thunder on Latios (over Grass Knot), since Draco kills Groudon anyway, and Thunder hits Kyogre really hard too, however losing GK might mess up vs Ttar, but tbh it's a prediction reliant strategy to hit Ttar on the switch with it anyway. The big problem I can see is how it's hard to keep the team structure, having to fit in some sort of U-turn sponge that isn't your E-killer check is kinda hard. If you wanna keep E-killer I agree with double dance Groudon nonetheless but I think what would be wise is:

Keeping RP Groudon.
Change E-killer to Thunder Wave Fightceus. The set I have in mind:

Arceus-Fighting @ Fist Plate
Trait: Multitype
EVs: 112 Spd / 252 HP / 80 SAtk / 64 Def
Timid Nature
- Judgment
- Ice Beam
- Thunder Wave
- Recover

With the given EVs you are only 3hkod by Jolly Scarfkroms Outrage after SR, and with Bolt Strike is set up bait for Groudon, this Arceus does a fine job here. It check stuff like Palkia (given spread outspeeds), Rayquaza, Darkrai and can come in on Giratina-O, another problem you mentioned. Paralyzing Arceus-Ghost is helpful in a pinch and U-turns doesn't hurt this guy either. Another utility is that it paralyze Lugia who likes to switch in on it- and a Thunder Wave on Lugia really helps you in the long run. With this set on your team, I am sure the performance will be as optimized as it gets. Good job though bro!

Lati weakness will maybe rise from this, so a replacement of Kyogre with Genesect is viable, but Ghostceus might be troublesome then. Usually T-wave from Fightceus+Iron Head Genesect and Groudon's Eq or Latios's Psyshock will keep it at bay. Also, Genesect can sponge some Outrages from Adamant scarfkrom.

 

[peacaroo]

Great team!

I would suggest trying Dialga in place of Deoxys-S to lay down rocks. I used a pretty similar team with Deoxys-S but eventually replaced it with Dialga as I found that Deoxys-S just wasn't good against many teams. Often, Deoxys-S only gets to lay down rocks (TTar, priority users, cloyster) and sometimes it can't do anything at all or at least not until much later into the match (against magic bouncers). Against some teams Deoxys-S is great, but against many good teams its like playing down 5-6 without any advantage in hazards.

I'd also recommend 252 Spd Jolly Groudon. You sacrifice some power and a tiny bit of bulk but I really think the extra speed more than makes up for it.
1) It beats Life Orb Dialga since they always run Modest. It also beats offensive Ho-Oh if you elect to run SE and can hit things like 252 Spd Specs Ogre if necessary.
2) At +2, it outspeeds Scarf Shaymin-S (and Scarf Mewtwo if that matters). This will become extremely important if you replace your priority users, since Scarf Shaymin-S can OHKO both Scarf Ogre and your current Groudon at +2.
3) It checks Excadrill and swift swimmers. You can outspeed and OHKO Kabutops and also +2 Excadrill before they EQ you. I've found this to be very useful.

You could try using Mewtwo instead of Latios. You lose out on the ability to OHKO Palkia, but you gain an emergency check against CM Arceus and Darkrai, and also hit Lugia harder (usually for over half).

 

[Blue Jay]

I agree with Furai on the double dance Groudon part (I was gonna suggest that lol... he owned me). Breaking down Giratina is of course something to aim for, and Lum Berry provides set up opportunities on Darkrai as well. I don't agree at all with the suggestions of SD Arceus-Ghost... It is simply lacking and just because you can hit the uncommon Lugia harder doesn't mean anything when you lose out on the priority on the team (as you have to change Giratina-o for something else as two ghosts are far too Darkrai weak).

To hit Lugia harder, you could try Thunder on Latios (over Grass Knot), since Draco kills Groudon anyway, and Thunder hits Kyogre really hard too, however losing GK might mess up vs Ttar, but tbh it's a prediction reliant strategy to hit Ttar on the switch with it anyway. The big problem I can see is how it's hard to keep the team structure, having to fit in some sort of U-turn sponge that isn't your E-killer check is kinda hard. If you wanna keep E-killer I agree with double dance Groudon nonetheless but I think what would be wise is:

Keeping RP Groudon.
Change E-killer to Thunder Wave Fightceus. The set I have in mind:

Arceus-Fighting @ Fist Plate
Trait: Multitype
EVs: 112 Spd / 252 HP / 80 SAtk / 64 Def
Timid Nature
- Judgment
- Ice Beam
- Thunder Wave
- Recover

With the given EVs you are only 3hkod by Jolly Scarfkroms Outrage after SR, and with Bolt Strike is set up bait for Groudon, this Arceus does a fine job here. It check stuff like Palkia (given spread outspeeds), Rayquaza, Darkrai and can come in on Giratina-O, another problem you mentioned. Paralyzing Arceus-Ghost is helpful in a pinch and U-turns doesn't hurt this guy either. Another utility is that it paralyze Lugia who likes to switch in on it- and a Thunder Wave on Lugia really helps you in the long run. With this set on your team, I am sure the performance will be as optimized as it gets. Good job though bro!

Lati weakness will maybe rise from this, so a replacement of Kyogre with Genesect is viable, but Ghostceus might be troublesome then. Usually T-wave from Fightceus+Iron Head Genesect and Groudon's Eq or Latios's Psyshock will keep it at bay. Also, Genesect can sponge some Outrages from Adamant scarfkrom.

Hey Hack! Thanks for your rate!

We discussed this in-game so I won't go into a detailed response here. I always did want to run Thunder on Latios, but in a dual weather team that was enjoying complete weather independence I was reluctant to do so. Still, Thunder may be so much better that it is worth having a useless move in sun (I don't really need to hit sun teams with Thunder anyways). These may however be my favourite changes proposed to date. A support Arceus-Fighting can be very nifty, and paralysis support along with having a bulky Pokemon with recover+uncommon weaknesses can compensate the loss of priority. And Genesect is generally my preferred Scarf Pokemon, and its lack of bulk is less of an issue because I can now switch Fightceus into weaker Ice moves.

Great team!

I would suggest trying Dialga in place of Deoxys-S to lay down rocks. I used a pretty similar team with Deoxys-S but eventually replaced it with Dialga as I found that Deoxys-S just wasn't good against many teams. Often, Deoxys-S only gets to lay down rocks (TTar, priority users, cloyster) and sometimes it can't do anything at all or at least not until much later into the match (against magic bouncers). Against some teams Deoxys-S is great, but against many good teams its like playing down 5-6 without any advantage in hazards.

I'd also recommend 252 Spd Jolly Groudon. You sacrifice some power and a tiny bit of bulk but I really think the extra speed more than makes up for it.
1) It beats Life Orb Dialga since they always run Modest. It also beats offensive Ho-Oh if you elect to run SE and can hit things like 252 Spd Specs Ogre if necessary.
2) At +2, it outspeeds Scarf Shaymin-S (and Scarf Mewtwo if that matters). This will become extremely important if you replace your priority users, since Scarf Shaymin-S can OHKO both Scarf Ogre and your current Groudon at +2.
3) It checks Excadrill and swift swimmers. You can outspeed and OHKO Kabutops and also +2 Excadrill before they EQ you. I've found this to be very useful.

You could try using Mewtwo instead of Latios. You lose out on the ability to OHKO Palkia, but you gain an emergency check against CM Arceus and Darkrai, and also hit Lugia harder (usually for over half).

Hey peacaroo, thanks for taking the time to rate my team!

Deoxys-S does indeed have its flaws and it is for this reason I often prefer Deoxys-A as a hazard setter for hyper offense (even dual hazards). However, paired with Magic Coat Giratina-O (which also catches many players off guard) it performs much better, and the team simply really appreciates multiple hazards whenever possible.

I'm afraid Jolly Groudon is simply too weak. All of those could be handy to outspeed, but even max attack LO Groudon fails to reliably OHKO some offensive threats after just SR; it simply cannot compromise at all where power is concerned (else I would not run Life Orb at all, I don't like it on anything without regenerator). I will, however, in all likelihood be keeping at least Giratina-O on the team, which gives me some priority and a check to Kabutops/Excadrill at least.

Latios is important as a Water resist (Kyogre is far less bulky and Giratina-O should be sheltered from damage so it checks Ekiller) and also importantly OHKOs Giratina, so I'm afraid it isn't really replaceable. Hack's changes should help against CM Arceus and Darkrai, while Latios with Thunder will hit Lugia hard in rain, at least.

Thanks for your feedback though!