Garchomp @ Rockium Z
Ability: Rough Skin
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Swords Dance
- Earthquake
- Dragon Claw
- Stone Edge
Alright, this set...
For starters. This thing I call set obviously does its job of luring Zapdos in more times than not. I know pretty well that other switch-ins to Garchomp exists, like Lando or PhysDef Tang, but if they're not present at the moment - be it because the opponent didn't fit them into their team or were previously taken care of, take your pick - then the big bird will come out to potentially shutdown the sand shark. That's when you completely wreck them with a well-timed Z SEdge on the switch or, if you were the switch-in, you can just ignore the Discharge or tank the Heat Wave (beware of its infamous 10% burn rate tho!) and just Sword Dance the HP Ice off, then bring Zapdos down with a SEdge or its Z variant, if you're afraid of the very common miss.
Some calcs to prove my point...
252 Atk Garchomp Continental Crush (180 BP) vs. 248 HP / 240+ Def Zapdos: 316-374 (82.5 - 97.6%) -- guaranteed 2HKO after Leftovers recovery
252 Atk Garchomp Continental Crush (180 BP) vs. 248 HP / 8 Def Zapdos: 444-524 (115.9 - 136.8%) -- guaranteed OHKO after Leftovers recovery
0 SpA Zapdos Hidden Power Ice vs. 4 HP / 0 SpD Garchomp: 240-284 (67 - 79.3%) -- guaranteed 2HKO
And yeah, I know, "What about Fire Fang? What will Chomp do without?" well. If there's no Zapdos around, Z SEdge can be used for the sole purpose of being a powerful one-time nuke to break through other common switch-ins, like Bulu and Celeestela (only at +2, tho, and then you'll have to trust that regular SEdge doesn't miss), while possibly killing a whole lot of Pokemon that didn't expect it.
In the end, I think this should be a viable option and is worth being considered if you need a not-so-common lure to the people's favorite yellow bird.