ORAS 1U Collection: 2 Stalls and 2 Balances

Fat, Hard Stall:

Spoiler: Importable

Lugia @ Leftovers
Ability: Multiscale
EVs: 252 HP / 252 Def / 4 Spe
Bold Nature
IVs: 0 Atk
- Aeroblast
- Roost
- Whirlwind
- Toxic

Chansey @ Eviolite
Ability: Natural Cure
EVs: 4 HP / 252 Def / 252 SpD
Bold Nature
IVs: 0 Atk
- Snatch
- Soft-Boiled
- Seismic Toss
- Toxic

Palkia @ Leftovers
Ability: Pressure
EVs: 248 HP / 252 SpD / 8 Spe
Calm Nature
- Rest
- Sleep Talk
- Dragon Tail
- Surf

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 252 HP / 212 Def / 44 Spe
Impish Nature
- Earthquake
- Roost
- Stone Edge
- Toxic

Sableye @ Sablenite
Ability: Prankster
EVs: 248 HP / 152 Def / 108 SpD
Calm Nature
IVs: 0 Atk
- Recover
- Foul Play
- Will-O-Wisp
- Taunt

Arceus-Fairy @ Pixie Plate
Ability: Multitype
EVs: 252 HP / 80 Def / 176 Spe
Timid Nature
IVs: 0 Atk
- Judgment
- Defog
- Recover
- Stealth Rock

Spoiler: Description

The idea of this team was pretty simple: slap on the two fat walls in Lugia and Chansey, throw on Mega Sableye because it's so good vs so many hazard setters, and SpDef Palkia to gives me a rock solid response to Kyogre. At this point, I didn't really have many options: I needed Defog, Stealth Rock, some sort of a plan versus stall, and I was super weak to Zekrom. Stealth Rock Arceus is janky, but at least it can get up rocks versus Mega Sableye, so I have a long term plan versus hard stall, and it has the tools to effectively wall offense and balance.

Physically Defensive Ho-Oh Stall:

Spoiler: Importable

Ho-Oh @ Leftovers
Ability: Regenerator
EVs: 248 HP / 244 Def / 16 SpD
Impish Nature
- Thunder Wave
- Roost
- Sacred Fire
- Brave Bird

Sylveon @ Leftovers
Ability: Pixilate
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Hyper Voice
- Wish
- Protect
- Heal Bell

Latias @ Soul Dew
Ability: Levitate
EVs: 252 HP / 104 SpA / 16 SpD / 136 Spe
Timid Nature
IVs: 0 Atk
- Roost
- Calm Mind
- Draco Meteor
- Psyshock

Groudon @ Rocky Helmet
Ability: Drought
EVs: 248 HP / 140 Atk / 120 SpD
Adamant Nature
- Stealth Rock
- Precipice Blades
- Stone Edge
- Thunder Wave

Sableye @ Sablenite
Ability: Prankster
EVs: 248 HP / 152 Def / 108 SpD
Calm Nature
IVs: 0 Atk
- Recover
- Foul Play
- Will-O-Wisp
- Taunt

Arceus-Water @ Splash Plate
Ability: Multitype
EVs: 252 HP / 4 Def / 252 Spe
Timid Nature
IVs: 0 Atk
- Judgment
- Will-O-Wisp
- Recover
- Defog

Spoiler: Description

The idea behind this was of a bulky semi-stall, with Physically Defensive Ho-Oh backed up by Mega Sableye for Magic Bounce, Groudon for Sun and Rocks, and a Defogger in Arceus-Water, making it difficult to take out. Sylveon provides good cover against mxied variants of Xerneas, whilst Ho-Oh is a usable check to Calm Mind variants of Xerneas, with Sun reducing Thunder's accuracy, and Arceus-Water and Latias outspeeding and being able to hit it decently hard in the event of an emergency. Beyond that the team is fairly straightforward, focussed on maintaining an advantage in the hazard game and converting that advantage into a victory. The team can be a little shaky versus SD Arceus-Ghost, but Arceus-Water speed ties and has Will-O-Wisp, whilst Ho-Oh handles it decently well if Stealth Rock isn't up. Groudon can also chip at it a little with Rocky Helmet, and lives a boosted Shadow Force from full.

LO Zekrom + Aromatherapy Xerneas + ScarfOgre Balance:

Spoiler: Importable

Kyogre @ Choice Scarf
Ability: Drizzle
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Water Spout
- Origin Pulse
- Thunder
- Ice Beam

Xerneas @ Leftovers
Ability: Fairy Aura
EVs: 32 Def / 252 SpA / 224 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Thunder
- Aromatherapy
- Focus Blast

Dialga @ Leftovers
Ability: Pressure
EVs: 248 HP / 56 SpA / 204 SpD
Modest Nature
IVs: 0 Atk
- Stealth Rock
- Draco Meteor
- Toxic
- Fire Blast

Zekrom @ Life Orb
Ability: Teravolt
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Bolt Strike
- Outrage
- Draco Meteor
- Roost

Yveltal @ Dread Plate
Ability: Dark Aura
EVs: 248 HP / 252 Def / 8 Spe
Impish Nature
- Foul Play
- Roost
- Sucker Punch
- Toxic

Arceus-Poison @ Toxic Plate
Ability: Multitype
EVs: 252 HP / 160 Def / 96 Spe
Jolly Nature
- Poison Jab
- Will-O-Wisp
- Defog
- Recover

Spoiler: Description

The idea behind this is to use LO Zekrom as a wallbreaker, with Roost to let it function as some sort of a check to Ho-Oh. Aromatherapy Xerneas is paired with it to alleviate Sacred Fire burns, and it can help wear down common checks such as Ferrothorn and Excadrill. Physically Defensive Yveltal is a Ground resist and Scarf Kyogre provide me a decent complement of Pokemon that offer me some capacity to check Ho-Oh. Kyogre acts as a cleaner and the rain support makes Xerneas's Thunder more accurate. It also helps manage Mega Blaziken, as under the Rain, both Xerneas and Arceus-Poison effectively resist both of its STABs. Kyogre also appreciates its teammates wearing down Ferrothorn. Dialga provides reliable Stealth Rock, and with Fire Blast can also threaten Ferrothorn. Wisp Arceus-Poison is a very reliable hazard clearer, with Will-O-Wisp to wear down hazard setters and an immunity to Toxic. SpecsOgre is maybe the biggest threat to the team, as it can 2HKO or OHKO the whole team with a full-powered Water Spout, however the majority of the Pokemon on the team outspeed SpecsOgre or do serious damage to it should it try and face off versus it one on one. Versus SpecsOgre, you need to consider more carefully the value of the Pokemon on your team should you be forced to sacrifice a Pokemon to it. Dialga, Arceus-Poison, and Xerneas all provide checks to Palkia, which Kyogre brings in and makes even more dangerous due to the rain brought about by Drizzle. Overall, Zekrom is the wallbreaker, Kyogre is the cleaner, and the rest of the team is largely supportive, handling various threats, and providing Stealth Rock, Defog, and Aromatherapy.

SubCM Xerneas Balance:

Spoiler: Importable

Aegislash @ Leftovers
Ability: Stance Change
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- King's Shield
- Toxic
- Iron Head
- Shadow Sneak

Xerneas @ Leftovers
Ability: Fairy Aura
EVs: 44 HP / 240 SpA / 224 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Calm Mind
- Substitute
- Thunder

Palkia @ Choice Scarf
Ability: Pressure
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Spacial Rend
- Hydro Pump
- Fire Blast
- Sleep Talk

Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Stealth Rock
- Earthquake
- Stone Edge
- Toxic

Yveltal @ Life Orb
Ability: Dark Aura
EVs: 32 HP / 128 Atk / 252 SpA / 96 Spe
Rash Nature
- Dark Pulse
- Oblivion Wing
- Sucker Punch
- Heat Wave

Arceus-Rock @ Stone Plate
Ability: Multitype
EVs: 252 HP / 4 Def / 252 Spe
Timid Nature
IVs: 0 Atk
- Judgment
- Recover
- Defog
- Will-O-Wisp

Spoiler: Description

SubCM Xerneas is the main stall-breaker on the team, always an important consideration on a team. Yveltal with Heat Wave provides a lure for Klefki. Scarf Palkia can act as a cleaner. The team is, like the team given above, focussed on providing a wall-breaker and cleaner combined with reliable hazard support and the tools to beat every common threat in the metagame. The team may suffer a bit from lack of staying power unfortnately versus more stallish teams, with Arceus-Rock the only Pokemon with access to Recover. Stall is certainly a weaker matchup, but this team has the tools to play any matchup.

SubCM Xerneas Balance (Alternative Version):

Spoiler: Importable

Aegislash @ Leftovers
Ability: Stance Change
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- King's Shield
- Toxic
- Iron Head
- Shadow Sneak

Xerneas @ Leftovers
Ability: Fairy Aura
EVs: 44 HP / 240 SpA / 224 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Calm Mind
- Substitute
- Thunder

Palkia @ Choice Scarf
Ability: Pressure
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Spacial Rend
- Hydro Pump
- Fire Blast
- Sleep Talk

Landorus-Therian @ Leftovers
Ability: Intimidate
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Stealth Rock
- Earthquake
- Stone Edge
- Toxic

Yveltal @ Life Orb
Ability: Dark Aura
EVs: 32 HP / 128 Atk / 252 SpA / 96 Spe
Rash Nature
- Dark Pulse
- Oblivion Wing
- Sucker Punch
- Heat Wave

Arceus-Electric @ Zap Plate
Ability: Multitype
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Calm Mind
- Judgment
- Ice Beam
- Recover

Spoiler: Description

This alternative version of the previous team runs Calm Mind Arceus-Electric over Defog Arceus-Rock, trading Defog support which isn't entirely mandatory on the team, for another offensive Pokemon, whilst still providing sufficient anti-Ho-Oh support alongside Palkia and physically defensive Landorus-T. The team still struggles more against teams with Ferrothorn or Klefki, but Arceus-Electric does synergise somewhat well with Palkia, as they have similar checks (such as Dialga) which can be worn down. It is also significantly weaker than the other version against Ekiller, which is maybe a bigger issue.