At first Scarf Deoxys-S seems pretty silly, but the more I thought about it the more sense it makes. The problem I don't think its reliable as shown in that video.
SuperEpic @ Choice Scarf
Ability: Pressure
EVs: 252 HP/240 Spd/16 SAtk
Timid nature (+Spd, -Atk)
- Stealth Rock
- Trick
- Shadow Ball
- Ice Beam
----
This is like a half antilead, it works perfectly, because nobody hope this set. Trick rapes bulky leads as groudon and dialga. Then u are free for use stealth rocks; trick can pwns anoter deoxys leads because they see a taunt coming, but when i do trick they got traped in taunt and they wont may use spikes or stealth rocks. Ice beam is a real surprise for rayquaza and scarfmyn, being this las the most surprised "wtf O.O". Shadow ball for another deoxys-e =P!
The evs spread give it more bulkyness, so it can resist some hits (something that is important sometimes).
For me is hard explain it because was made by the great raikoulover :happybrain:
This works :naughty:
IN action > http://www.youtube.com/watch?v=ZUrwu7PwD9Q
To start its main differences is that between it and normal Deoxys-S it only lays one entry hazard, Tricks a scarf instead of Taunting and has two attacks instead of one. One thing I'd suggest is swapping SR for Spikes as the latter have a lot less users and few as reliable as Deoxys, whereas SR can be laid by almost anything.
Against the top ubers leads it can either do really well or not very well at all. While it is guaranteed to go first pretty much, this is how I see it playing out against the top 7 leads;
Against other Deoxys-S, if you trick and they Taunt they are forced out whereas you can attack or switch. If they SR they are also forced out. Problem is if they attack with say Shadow Ball you are forced out but on the plus side you can switch in a normal type/TTar/etc and have a turn of free setup. The main failure of this set is if they lay Spikes, they are as far as I can see guaranteed to get all 3 layers down.
Against lead Groudon, it is not going to like getting Scarfed as they usually are zero speed. However as most Deoxys-s carry Taunt and most are sashed its hard to tell what the opponent will do. While their best move is to Twave, they'll probably assume they are going to be taunted and not do so. Personally if I was facing a Deoxys-S lead I'd switch out and go straight on the offensive with Ho-oh or something.
Next is Darkrai, on the plus side we outspeed ScarfRai, on the downside unless he is carrying Lum Berry we get put to sleep. The other problem is if you trick you never know what item you'll get, as Darkrai's top 4 items are used roughly 20% of the time each. Hoever if you picked superpower and put over 100 EVs into attack you come out on top.
Which brings me to the following point, about this set, what exactly are all those speed EVs for? Even with none you are still outspeeding Rock Polish Mew and everything down with a scarf on. I guess its a matter of weight up how much speed you want after you've tricked as putting just 52 into speed lets you still come out ahead of things like ScarfRachi and Scarf Palkia.
If anything this set has a lot of freedom allocating EVs, but suffers from move-slot syndrome. If you want to OHKO both Darkrai and Shaymin-S you have to make sacrifices elsewhere.
Speaking of which Shaymin-S normally makes sport of Deoxys-S, but a scarfed Ice Beam should takes care of that.
Next up is Deoxys-A. You lose without Extremespeed here, you cant OHKO them thanks to sash, and they can't OHKO thanks to the extra bulk Shadow Ball does 90% max. Problem is they will ES to finish you off whereas you need to use ES twice to win.
Kyogre is problematic as you don't know whether its going to attack or try to cripple you. You can't really beat it.
Dialga is a pain, its going to attack and that is going to hurt. At best you can hope to cripple it with Superpower and surprise your opponent with any additional bulk you may be running.
In short this set has potential, and can be tailored to your needs as they only really essential bit is the 252 HP EVs, the rest can be placed as needed. There are also a decent selection of attack moves that have various uses on this set, but ultimately this Deoxys-S gains new weakness as it sheds old ones.