Evolve body to Ferrothorn
Pokemon: 364
Evolve head to Lairon
Pokemon: 391
#390.413
Aron/Ferroseed
390.413
tyto2020
steelgrass
#413.390
Ferroseed/Aron
413.390
kaitheangel
steelrock

48(+2)
HP
46(-2)
56(-7)
ATK
63(+7)
94(-3)
DEF
97(+3)
34(+5)
SP.ATK
29(-5)
55(-15)
SP.DEF
70(+15)
16(-7)
SPEED
23(+7)
303(-25)
TOTAL
328(+25)

Regular
Sturdy: Can't be 1-hit KO'd at full HP.
Rock Head: Doesn't take recoil damage.
Iron Barbs: Attackers lose 1/8th max HP on contact.
Hidden
Heavy Metal: Double the normal weight for its species.
Iron Barbs: Attackers lose 1/8th max HP on contact.

x4
fire
fightingground
x4
x2
fighting
water
x2
x1
bugdarkflyingghostgroundice
darkelectricfireghostgrasssteel
x1
x1/2
dragonelectricfairynormalpsychicrocksteelwater
bugdragonfairyicepsychicrock
x1/2
x1/4
grass
flyingnormal
x1/4
x0
poison
poison
x0

#390
Aron
390
8
Game Freak & onix98
steelrock
Lv.32
#391
Lairon
391
7
Game Freak
steelrock
Lv.42
#333
Aggron
333
+
okamical
steelrock
#413
Ferroseed
413
7
kingofthe_x_roads
steelgrass
Lv.40
#364
Ferrothorn
364
9
organical.mechanical
steelgrass