Since barry is unlikely to post a sample team anyway, I am posting one for him. If everyone agrees to change it, it's fine. Oh, I saw barry using a team to test Sunny Day Reshiram and this one is similar about 95%? to it :)
Forretress (M) @ Leftovers
Trait: Sturdy
EVs: 252 HP / 56 Def / 200 SpD
Bold Nature (+Def, -Atk)
- Toxic Spikes
- Spikes
- Toxic
- Rapid Spin
Standard Forretress, with Toxic. Toxic is used to prevent Forretress from being set up fodder. It can beat SD Arceus one-on-one with Toxic and set up Spikes on Arceus. Poisoning Kyogre on the switch in can also be a key in winning against rain teams. Both Spikes and Toxic Spikes are important to wear down the opponent. Forretress's Special bulk is horrible so the investment are mandatory. Bold to survive double +1 LO Rayquaza Outrages and possibly 2 Scarf Zekrom Bolt Strikes. The hazards Forretress set up allows Reshiram to blow past its usual counters such as Blissey(Toxic Spikes) and Ho-Oh (Stealth Rock)
Groudon @ Leftovers
Trait: Drought
EVs: 252 HP / 176 Atk / 68 Def / 12 Spe
Adamant Nature (+Atk, -SpA)
- Stone Edge
- Stealth Rock
- Dragon Tail
- Earthquake
Base of this team. Stone Edge is needed to smash Ho-Oh who could be very problematic otherwise. Earthquake smashes Dialga, Tyranitar, and Rock Arceus, all dangerous threats to this team. Dragon Tail phazes out the opponent and strips off a good amount of health from opposing sweepers such as Rayquaza or Garchomp. EVs are for optimum bulk while retaining much of Groudon's power. The Adamant nature helps Groudon 2HKO Ferrothorn after Spikes damage and it can also 2HKO non Defensive Arceus formes with Toxic Spikes support. Due to this Support Groudon's power, most people will assume it is an Offensive Groudn with leftovers. Defense EVs are random and helps Groudon survive a +1 Outrage from Rayquaza guaranteed.
Reshiram @ Leftovers
Trait: Turboblaze
EVs: 252 SpA / 4 SpA / 252 Spe
Modest Nature (+SpA, -Atk)
- Sunny Day
- Blue Flare
- Dragon Pulse
- Substitute / Ancient Power
Reshiram plays a very important role in this team. Lure in Kyogre and set up Sunny Day to control the weather. While it might seem weird, Reshiram can even Blue Flare Kyogre for quite a bit of damage in the sun while non Specs Kyogre can not 2HKO in return. This will probably force the opponent to switch, giving you time to set up Substitute or just attack away. Dragon Pulse nails any Dragon-type who dares to switch in, even Specially Defensive Giratina faces a possible 2HKO after Stealth Rock. You can use Ancient Power to get past Ho-Oh and if you are feeling lucky about getting that 10% boost. Solar Beam or Focus Blast isn't needed as the team has Venusaur. Tyranitar takes quite a bit of damage from Blue Flare in the sun anyway.
Venusaur (M) @ Life Orb
Trait: Chlorophyll
EVs: 252 SpA / 40 SpD / 216 Spe
Modest Nature (+SpA, -Atk)
- Grass Knot
- Growth
- Sludge Bomb
- Sleep Powder
A very underrated threat in Ubers. Once boosted, few things can stop this thing. Offensive Kyogre is OHKOed by Grass Knot so even the fat whale has to be wary of switching in. Sleep Powder is very useful for giving Venusaur free turns especially against foes who are immune to Toxic Spikes, Dialga, Ho-Oh, Lugia, Giratina-O and others. Sludge Bomb is a very useful STAB, and the poison chance can come in handy. It easily OHKOes both Mewtwo and Darkrai at +2 with Sludge Bomb while even the mighty Arceus is OHKOed by a boosted Grass Knot after Stealth Rock. Grass Knot is used over Energy Ball because Sludge Bomb already smashes Manaphy anyway and most Ubers tend to be heavy. Life Orb over leftovers for more power because Venusaur desperately needs it. In the sun, Venusaur can also used to revenge kill enemies such as against Ground Arceus ( major sun threat ), Darkrai or Shaymin-S.
Arceus-Ghost @ Spooky Plate
Trait: Multitype
EVs: 232 HP / 220 Def / 56 Spe
Bold Nature (+Def, -Atk)
- Calm Mind
- Recover
- Roar
- Judgment
Arceus-Ghost blocks spin and sweeps the opposing team with Calm Mind. Roar is to prevent opponents from setting up along side you which is very useful against Kyogre or opposing Arceus formes. Roar can also save the team by phazing out Ho-Oh behind a Sub. Recover is obvious while EVs are for more physical bulk to deal with Dragon Dance Rayquaza, Scarf Zekrom and takes much less damage from Mewtwo's Psytrike. Since this team lacks a Steel-resist outside of Forretress, Arceus-Ghost is chosen over Giratina-O to deal with Dragon-type sweepers better.
Palkia @ Choice Scarf
Trait: Pressure
EVs: 252 SAtk / 4 SpD / 252 Spe
Timid Nature (+Spe, -Atk)
- Spacial Rend
- Fire Blast
- Thunder
- Hydro Pump
Palkia checks Kyogre for the team and revenges DD Rayquaza as well. Spacial Rend is for some cleaning up late game, Fire Blast rips Steels and abuses the sun boost, Thunder slams Kyogre hard while Hydro Pump is in the last slot if the weather is rainy. Stone Edge can be used over Hydro Pump to deal with Ho-Oh. Scarf Palkia is standard, and is still used to revenge kill foes such as Mewtwo and Darkrai.
EDIT: Is this still being worked on?