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let them in (Houndoom) @ Houndoominite
Ability: Flash Fire
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Nasty Plot
- Fire Blast
- Dark Pulse
- Super Fang / Sludge Bomb / Will-O-Wisp
Thanks to Mega Houndoom's decent defenses and typing, it resists or is immune to every move Jirachi can use against it with the exception of U-turn, which it is neutral to (However, it still doesn't do too much damage). Even though it's unlikely, it can even get a Flash Fire boost from Fire Punch before Mega Evolution. It can OHKO at any time with Fire Blast or can set up a Nasty Plot. If it has Will-O-Wisp, it can burn Jirachi and make it near useless.
The only reason it's not a hard counter is because of a Stealth Rock weakness and the fact that Jirachi can invalidate everything with Iron Head flinches (which it technically can to any other check), but it's certainly a soft counter.
252 Atk Jirachi Iron Head vs. 0 HP / 0 Def Mega Houndoom: 60-71 (20.6 - 24.3%) -- guaranteed 5HKO
252 Atk Jirachi U-turn vs. 0 HP / 0 Def Mega Houndoom: 70-83 (24 - 28.5%) -- 97.5% chance to 4HKO
--
252 SpA Mega Houndoom Fire Blast vs. 0 HP / 0 SpD Jirachi: 380-450 (111.4 - 131.9%) -- guaranteed OHKO
Heatran @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 8 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Stealth Rock
- Lava Plume
- Will-O-Wisp/Earth Power/Toxic
- Taunt
Heatran can come into any of Jirachi's common moves, shrug them off and proceed to Wisp, set up rocks or Lava Plume it. The only issue with Tran is that it loses momentum if Rachi clicks U-Turn, which it usually will if there is a Heatran present
Ability: Rough Skin
EVs: 240 HP / 176 Def / 92 Spe
Impish Nature
- Stealth Rock [
] / Rest [
]
- Earthquake [
]
- Dragon Tail [
]
- Fire Fang [
] / Fire Blast [
]
TankChomp is a great counter to Jirachi, as without attacking, it can make Jirachi lose about a 1/4 of its HP due to the damage taken from Rocky Helmet + Rough Skin. The moveset is fairly standard, but I've made two changes to suit Garchomp's matchup against Jirachi. Firstly, I slashed Rest because Jirachi has no means of setting up, and so, when Garchomp is asleep, all it can do is either: a) attack and take damage, b) switch out, c) use Healing Wish, meaning that Garchomp can't be used as set-up fodder by it. Dragon Tail is perfect if Stealth Rock is out, and does decent damage because Jirachi isn't investing in Defense. Fire Fang is used over Fire Blast at the expense of more power. The reason for this is because Fire Fang hits Jirachi on the physical side (it should do slightly more damage because Jirachi isn't investing in Def), and has 100% accuracy, unlike Fire Blast which can tend to be a bit unreliable at time. Here are some calcs:
vs
0 Atk Garchomp Earthquake vs. 0 HP / 0 Def Jirachi: 270-320 (79.1 - 93.8%) -- guaranteed 2HKO
0 Atk Garchomp Fire Fang vs. 0 HP / 0 Def Jirachi: 118-140 (34.6 - 41%) -- guaranteed 3HKO
vs
252 Atk Jirachi Iron Head vs. 240 HP / 176+ Def Garchomp: 87-103 (20.8 - 24.7%) -- guaranteed 5HKO [takes like ~30% from Rocky Helmet + Rough Skin, iirc]
252 Atk Jirachi U-turn vs. 240 HP / 176+ Def Garchomp: 51-61 (12.2 - 14.6%) -- possible 7HKO
252 Atk Jirachi Heart Stamp vs. 240 HP / 176+ Def Garchomp: 66-78 (15.8 - 18.7%) -- possible 6HKO