I have used Jirachi a lot in the past few weeks. SubToxic annoys so many teams without Heatran as its typing allows it to switch in againt many threats. Even with 252 HP, you can switch in against Alakazam, Gardevoir, Latios, Clefable, Kyurem-B, Reuniclus, Mega Sceptile, Defensive Starmie, Togekiss and Toxicroak and get a free sub when they switch out. Early game you can also switch in against stuff like Mega Diancie and Mega Aero bluffing a scarf set and set up a sub. With Iron Head flinching 60% of the time, Toxic damage stacks up pretty easily and Leftovers helps you stay healthy. I prefer using a pretty fast spread to outspeed max speed jolly Mega Altaria, Mamoswine and Hoopa-U. Offensive Lando-T, Kyurem-B, Excadrill and the whole 262 - 266 speed tier are also outsped with these EVs.
Jirachi @ Leftovers
Ability: Serene Grace
EVs: 252 HP / 56 Atk / 200 Spe
Adamant Nature
- Substitute
- Iron Head
- Toxic
- Fire Punch
Another Jirachi set I used to use much just after the Greninja ban was Superachi (Offensive Calm Mind) Just like Expert Belt, Superachi can lure in pokemon like Heatran, Magnezone and Skarmory and because of its huge offensive movepool it can lure in pokemon depending on what the team needs. Once revealed CM, Jirachi also attracts defensive pokemon like Chansey and Unaware Clefable only to be ohko'd or 2hko'd by one of its coverage moves.
+1 252+ SpA Life Orb Jirachi Psyshock vs. 4 HP / 252+ Def Eviolite Chansey: 308-364 (47.9 - 56.6%) -- guaranteed 2HKO after Stealth Rock
+1 252+ SpA Life Orb Jirachi Grass Knot (60 BP) vs. 120 HP / 252+ SpD Alomomola: 265-315 (52.8 - 62.8%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
+1 252+ SpA Life Orb Jirachi Hidden Power Fire vs. 252 HP / 4 SpD Skarmory: 312-369 (93.4 - 110.4%) -- guaranteed OHKO after Stealth Rock
Jirachi @ Life Orb
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
- Calm Mind
- Psyshock
- Grass Knot
- Hidden Power Ground
This is the favorite set but like I said there are 20 other options instead of HP Ground or Grass Knot. Use this on a team that likes Heatran or Quagsire gone and you will almost always succeed. It kinda works the same as Lure Jirachi except that it is a bit more powerful even before boosting and when given a free turn to use CM, +1 LO does huge damage. Psychic is an option because pokemon like Skarmory and Hippowdon can be annoying if you lack a supereffective coverage move. It's not a huge wallbreaker like Kyurem-B (a +1 psychic hits as hard as a Draco from Latios to make a comparison) , but against balanced teams it does its work pretty good