As an avid user of Hyper Offense I'd just like to throw in my 2 cents.



Deoxys-Defense: I've had a ton of experience with this thing, and it is bar none the most reliable hazards setter in OU (but you already knew that). What makes it so unique is the unreal combination of ubers-worthy bulk, decent speed (enough to outspeed most relevant things in OU that flat out OHKO it), and its access to an excellent support movepool. Another interesting thing to consider is how it can beat a lot of things that can potentially OHKO it or stop it from doing its job. Running Magic Coat lets it beat fast Taunters. Running Mirror Coat lets it beat non-LO Aegislash. Running Superpower + a few Atk EVs lets it OHKO the most common forms of Bisharp and start the game 5-5 with hazards (as opposed to 5-6 with hazards).



At this point, we have to ask ourselves: why would we use any other entry hazard lead? There's the option of Shuckle, who trades Spikes for Sticky Web, or Mamoswine/Landorus-I/Garchomp, who thrive on the instant offensive pressure that they generate upon entering the field. The problem with the latter is that they are unreliable. They must run a Focus Sash in order to not be instantly KOed by faster threats, which means a fast/priority Taunt will ensure they don't do their job.



We move on to Shuckle, who will surely be the HO lead of choice in the event of a Deo-D ban. The disadvantage of using Shuckle is that without the huge support movepool of Deo-D, it is easily exploited by a set-up sweeper early game. It is also slower than most common Defoggers, and can't do anything back to them (whereas Deo-D could just Taunt them and keep hazards in play). Shuckle is only used now for its niche of Sticky Web - that's all it has over Deo-D. Deo-D is better in every single way.



For this reason, it harms the diversity of the metagame. If you want an effective hazards user for a HO team, you run Deo-D. Nothing else.



Ban Deoxys-Defense



Deoxys-Speed: This thing is ridiculous. The amount of shit it can do is unreal. One of my most successful team has utilised the Dual Screens set to set up and start doing damage right off the bat. More recently, the new wave of Baton Pass teams have come under some fire, with some labelling them broken. Surely this is only because of the free turns that Deo-S provides with its screens support, forcing the opponent into the choice of Defogging away screens, or staring down a Scolipede with +2 Defense and screens support to boot. This strategy would be much less threatening should Deo-S see a ban.



In the previous Deo-S suspect test, the majority of Deo-S' were still hazards leads - a set that is (mostly) outclassed by Deo-D. Because of this, many found Deo-S underwhelming and voted not to ban. A few weeks later, its deadly LO Revenge Killer set surfaced in OU, being able to revenge kill nearly every relevant offensive threat. A single Pokemon should not have the means to do that so effectively. With the incredible offensive pressure this set generates, it forces switches easily and sets up Stealth Rock with ease, being able to dodge the majority of Taunts in the metagame.



It can run so many other sets too, but I can't be assed to list them all. Bottom line is, the incredible diversity of this mon means there are no hard stops to all of its sets - and one wrong switch can punish your Pokemon or your team tremendously, whether it be in the form of screens or a nuke in Psycho Boost.



Ban Deoxys-Speed