#311.391
Duskull/Lairon
311.391
#391.311
Lairon/Duskull
391.311

33(-13)
HP
46(+13)
73(+17)
ATK
56(-17)
123(+17)
DEF
106(-17)
36(-7)
SP.ATK
43(+7)
76(+13)
SP.DEF
63(-13)
35(+5)
SPEED
30(-5)
376(+32)
TOTAL
344(-32)

Regular
Reg.
Sturdy: Can't be 1-hit KO'd at full HP.
Rock Head: Doesn't take recoil damage.
Levitate: Immune to Ground-type moves, Spikes, Toxic Spikes, and Arena Trap.
Hidden
HA
Heavy Metal: Double the normal weight for its species.
Frisk: Upon entering battle, reveal the foe's held item.

x2
DarkGhostGrassGroundSteelWater
DarkFireGhostGround
x1
DragonElectricFairyIcePsychicRock
ElectricWater
x0.5
BugFireFlying
DragonFairyFlyingGrassIcePsychicRockSteel
x0.25
Poison
Bug
x0
FightingNormal
FightingNormalPoison

#311
Duskull
311
Lv.37
#312
Dusclops
312
Lv.50
#313
Dusknoir
313
#311
Duskull
311
Lv.37
#312
Dusclops
312
Lv.50
#313
Dusknoir
313
#390
Aron
390
Lv.32
#391
Lairon
391
Lv.42
#333
Aggron
333
#390
Aron
390
Lv.32
#391
Lairon
391
Lv.42
#333
Aggron
333

Hidden Forest, Hidden Tomb
Pokemon: 311
Sky Pillar, Evolve Duskull (Lv37)
Pokemon: 312
Evolve Dusclops (Lv50 or Reaper Cloth)
Pokemon: 313
Route 9
Pokemon: 390
Evolve Aron (Lv32)
Pokemon: 391
Mt. Mortar (static), Evolve Lairon (Lv42)
Pokemon: 333