Zekrom won't get good use out of Volt Change because Groudon is the most common switch-in.
Anyway, this is an Arceus set I've been using on a stall team and it's been working out pretty well. I should probably post the whole team to put it in context but for now I'll just talk about this set.
Arceus-Steel @ Iron Plate
Calm
248 HP/200 Def/40 SpD/20 Spe
~ Will-O-Wisp
~ Calm Mind
~ Recover
~ Spacial Rend
The idea behind this set is to burn any physical attackers (read: Groudons) that come in on you and wall everything else with Calm Mind and eventually clean up the remaining pokemon on your opponent's team with Spacial Rend.
The EVs are designed to allow for maximum physical bulk while still maintaining a reasonable level of unboosted special bulk. The speed EVs are to specifically outspeed Groudon and other slow base 90s, though running a Timid nature will allow you to outspeed all non-scarfed base 90s and the slower base 95s.
The moveset probably reminds you of CM Giratina's old walling set, and that's because it basically is. They function basically the same, with the difference being that Arceus trades immunities and some HP for better overall typing, more speed, and a more diverse movepool.
The fourth move is sort of filler. You could run a lot of things in that spot, but I have chosen Spacial Rend for its high base power, increased critical hit rate, and effectiveness against all the dragons that are present in Ubers. There is nothing that has a 4* resistance to Dragon, which makes it almost ideal as an attacking move. Arceus' movepool is diverse enough that you can pretty much run whatever your team needs here.
Ho-Oh is probably the best counter to this set, as he can't be burnt and Sacred Fire will OHKO in the sun and 2HKO in neutral weather while Spacial Rend won't deal any significant damage without an extreme amount of boosting due to Ho-Oh's naturally high SpD. Rain support and Stealth Rock are the best ways to deal with this guy, and quite honestly they're the only way.
Groudon is the second best counter to this set. LO RP Groudon can still get a clean 2HKO on Arceus while burned, but Arceus outspeeds him and taking 22% a turn won't help him stay alive too long. You also outspeed before he boosts and an unboosted Spacial Rend can do 25% or more to help speed up the clock. For all Groudons without a boosting item, Arceus can Recover the hits as they barely 3HKO while burnt. The only way Groudon can beat this set is by using Lum Berry, and Toxic Spikes support from Forretress or Tentacruel can take care of that.
Deoxys, Deoxys-A, Rayquaza, Zekrom, and Ononokusu can all potentially 2HKO with physical fighting or ground attacks, but get destroyed by unboosted Spacial Rend (Technician Breloom can 3HKO with Mach Punch but gets 2HKO'd by Spacial Rend, or he can just use Spore so w/e). Doryuzu, Scizor, Garchomp, Mamoswine, Terakion, Lucario, and Landlos can also 2HKO but get dealt with quite easily by being burnt. Close Combat users also have the disadvantage of being more suceptible to Spacial Rend after using their main attacking move. Roopushin is threatening if you do not have any CMs in as he will only be OHKO'd by a +4 Spacial Rend at the minimum, not counting residual damage. Burning Roobushin is also bad, as it will allow him to 2HKO you with Guts Drain Punch and Mach Punch. Heracross is similar in this regard.
For these reasons, Giratina-O is Arceus' BFF, as he is immune to both Ground and Fighting while being resistant to Fire, Arceus' other weakness. Arceus compliments Giratina well also, since he resists all of G-O's weaknesses.