Deoxys-D is an insane spiker, easily the best. Pros compared to other walls:
- It has Recover, something Cresselia lacks, making it a brilliant survivor.
A lot of pokemon have recover. Having recover doesn't make something uber.
- It has Pressure, making it a great staller.
With what moveset?
- It does not have a Magnet Pull weakness and Dugtrio doesn't do enough damage to pose a threat. Due to its natural bulk, it can take Pursuits decently when it doesn't swap out (though Scizor, Tar and Weavile have threatening attacks when it stays in).
What else commonly uses pursuit besides those 3? You're fucked if any of them show their faces.
- Unlike Skarmory and Forry, the two most common OU spikers, it is an excellent wall both physically and specially. (And spinningis very hard due to the popularity of Gengar and Rotom (and Dusknoir)).
most spikers today are suicide leads, and they're generally more effective than Deoxys-D since they're basically guaranteed to get rocks down, and are offensively threatening unlike Deoxys-D.
- Generally better offensive than Skarm, Cresselia and others in most situations (that is, bearing super effective hits or Gyro Ball against fast pokemon) due to Seimsic Toss/Night Shade.
Why anyone would use Seismic Toss/Night Shade on Deoxys-D is beyond me, when there are much better options than it.
- Makes a good defensive Calm Minder.
So do Suicune, Celebi, Jirachi, and Cresselia
- Can set up both screens but with greater durability than Deoxys-s and Bronzong.
Since Deoxys-D is much slower it may not even be able to get them down if it gets taunted or battered by supereffective moves. Deoxys-S doesn't have to worry about getting taunted or any of that since its faster then damn near everything.
- It can use Agility to abuse Taunt, Calm Mind and other moves, enabling it to outspeed Deoxys-s and Timid Scarf Azelf, and everything else used in all the metagames.
If you're planning on using all 3 of those moves on the same set then you'll only have 1 attacking move and no recovery.
- Not many weaknesses (3) (though few resistances and weaknesses are rather common).
- Great move pool.
Its introduction into OU will lead to a mass spikes and stall dominated metagame. Personally, I don't think any of the ubers should be let into OU. We can test Chomp again due to Plat changes, but he'll still remain Uber till the next generation, when I'm hoping better physical ice moves will send him back to OU. Manaphy will create far too many rain teams, and Lati@s' Draco Meteor is much more fearsome than Salamance's, backed up by better typing and movepool.
The metagame already is dominated by stealth rock/spikes with all the suicide leads running amuck. People will still choose suicide leads>deoxys-d because of the speed and better offensive threat. Personally I think Deoxys-S is a better spiker because of the speed. Yes Deoxys-D is still a good spiker, but does that make it uber?. And so what if the metagame becomes more stallish? Why is that a bad thing?