So since the topic of the day is "What can set up on Deo-D while he lays hazards?" I figured I'd point out some of the way Deo-D, or his teammates, can handle certain set-up sweepers (at least on my HO team, anyway). In all these scenarios, Deo-D's moveset is Thunderwave/Taunt/Stealth Rock/Spikes, and his item is Mental Herb (AKA the set I run, since this is based on my experience). Deo-D vs. Terrakion: I use T-wave. If he doesn't set up a substitute, he's crippled. If he does, oh well. I'll just keep setting up hazards while he gleefully sets up Swords Dances. He kills me with Stone Edge whenever's he's done setting up, I switch in Gengar, Disable his Stone Edge, and force him out while I get to set up a Substitute myself. Threat handled. Deo-D vs. Dragonite: I taunt first turn. If he's banded, I guess I end up getting walloped. If not, threat handled. Deo-D vs. Garchomp: Much the same thing as with Terrakion. I just keep setting up hazards while he keeps Swords Dancing, and then after he kills me, I send in my Choice Scarfer (in this case, Latios) and threaten him out. Threat handled. Deo-D vs. Thundurus-T: Taunt first turn. If he set up a Nasty Plot before I could Taunt him, I can easily revenge kill him. If he set up an Agility, then I'm in a bit of a pickle. Fortunately I have two priority users on my team, one of which is Weavile. 252 Atk Life Orb Weavile Ice Shard vs 0 HP/0 Def Thundurus-T: 72.24% - 85.28% (2 hits to KO) 'Tis unfortunate, I'll have to send in Lucario on the next turn to E-Speed it. So Thundurus-T is a threat. Deo-D vs. Volcarona: I T-wave as he Quiver Dances. If he doesn't have Lum Berry, I'm sittin' pretty. If he does, I get 6-0'ed. So Volcarona is a huge threat that must be more carefully handled. Deo-D vs. Tyranitar I just set up hazards. Regardless of whether or not he's Banded or Scarfed, I'm limited to just one layer. Although if he's Scarfed, I can tank the first Crunch, set up my rocks, and then send in Lucario on the second for a free Justified boost. Yipee. I don't rightly care about Taunting Tyranitar since it's too risky and if he sets up rocks, oh well, my team can handle it. So in all my experiences with Deo-D, only Agility Thundurus-T, Lum Berry Volcarona and CB Tyranitar are consistent answers to it / threaten the rest of my team. Now, I probably missed something here so feel free to decry my analysis and call me a noob, but this is what I came up with.