Magearna @ Ghostium Z
Ability: Soul-Heart
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Shift Gear
- Calm Mind
- Shadow Ball
- Thunderbolt/Ice Beam/Fleur Cannon
This isn’t nearly as effective as Magearna’s other incredible Z-move sets, but it seeks to capitalize on Jirachi’s increased usage by luring it in, killing it with a strong Never-Ending Nightmare, and picking up a Soul-Heart boost. This is one of the few Magearna variants that isn’t too annoyed by Jirachi’s increased usage as a dedicated check to a bunch of special attackers.
+1 252 SpA Magearna Never-Ending Nightmare (160 BP) vs. 248 HP / 188+ SpD Jirachi: 396-468 (98.2 - 116.1%) -- guaranteed OHKO after Stealth Rock and Leftovers recovery
The set isn’t without its massive issues, however; while Shadow Ball gives it great neutral coverage it massively limits its super effective coverage and, as a result, many OHKOs and reliable 2HKOs, forcing it to make the tough choice between Fleur Cannon, Ice Beam, and Thunderbolt. But if you really hate SpDef Jirachi it’s one of its better lures because it can utterly demolish Jirachi and even play some mindgames with it. Shadow Ball also gives it something with which to hit Mega Lati@s, Mega Medicham, and Tapu Lele without committing to Fleur Cannon’s nasty drawbacks although Fleur trashes all of them if you run it. The Z-move can also do a hefty chunk to offensive Tran.
Substitute>Shift Gear with a bulkier spread and a Modest nature to guarantee the OHKO on Jirachi can be considered but it’s not as good imo.