Pokemon: 307
Devolve body to Shieldon
Pokemon: 233
Devolve head to Porygon2
#275.308
Porygon-Z/Bastiodon
275.308
kiwikelly
normalsteel
#308.275
Bastiodon/Porygon-Z
308.275
.izik
rocknormal

76(+8)
HP
68(-8)
61(-9)
ATK
70(+9)
135(+33)
DEF
102(-33)
105(+29)
SP.ATK
76(-29)
96(-21)
SP.DEF
117(+21)
50(-20)
SPEED
70(+20)
523(+20)
TOTAL
503(-20)

Regular
Sturdy: Can't be 1-hit KO'd at full HP.
Download: Upon entering battle, ATK rises one stage if the foe has less DEF than SP.DEF. Otherwise SP.ATK rises one stage.
Adaptability: Its STAB moves have 2x power instead of 1.5x.
Hidden
Soundproof: Immune to sound-based moves.
Analytic: Moves have 1.3x power when attacking last.

x4
fighting
fighting
x4
x2
fireground
grassgroundsteelwater
x2
x1
darkelectricwater
bugdarkdragonelectricfairyicepsychicrock
x1
x1/2
bugdragonfairyflyinggrassicenormalpsychicrocksteel
fireflyingnormalpoison
x1/2
x0
ghostpoison
ghost
x0

#137
Porygon
137
+
Game Freak
normal
UPGRADE
#233
Porygon2
233
+
The Pokémon Company & xigzagoon
normal
DUBIOUSDISC
#275
Porygon-Z
275
+
Game Freak
normal
#307
Shieldon
307
+
scarecrow_924
rocksteel
Lv.30
#308
Bastiodon
308
8
Game Freak
rocksteel