That Zekrom seems to die really easily, just saying. Anyway, just so we don't have to use an Arceus form, we can use
HIPPOWDON!!
Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 252 Def / 4 SpD
Nature: Impish
- Earthquake
- Stealth Rock
- Slack Off
- Roar
Yeah, you're still taking 65%ish from +1 Outrage (provided it gets to +1), but you can easily switch into Sub, and then just EQ for easy pickings. Since Zekrom is holding Life Orb, Sand + LO + Sub + (SR) = Dead Zekrom in a couple of turns, easily. Using Hippowdon means using a Sand team, I guess, but if you don't want to run Sand, you can always use Sand Force, I guess.