#10.89
Caterpie/Muk
10.89
#89.10
Muk/Caterpie
89.10

65(-20)
HP
85(+20)
80(+25)
ATK
55(-25)
61(+13)
DEF
48(-13)
35(-15)
SP.ATK
50(+15)
46(-27)
SP.DEF
73(+27)
48(+2)
SPEED
46(-2)
335(-22)
TOTAL
357(+22)

Regular
Reg.
Stench: Damaging moves have a 10% chance to make the target flinch.
Sticky Hold: Held item can't be removed by other Pokémon.
Shield Dust: Immune to moves' secondary effects.
Hidden
HA
Poison Touch: Contact moves have a 30% chance of poisoning the target with each hit.
Run Away: Can always escape or switch out.

x2
FireFlyingPsychicRock
x2
x1
DarkDragonElectricGhostGroundIceNormalSteelWater
x1
x0.5
BugFairyPoison
x0.5
x0.25
FightingGrass
x0.25

#10
Caterpie
10
Lv.7
#11
Metapod
11
Lv.10
#12
Butterfree
12
#10
Caterpie
10
Lv.7
#11
Metapod
11
Lv.10
#12
Butterfree
12
#88
Grimer
88
Lv.38
#89
Muk
89
#88
Grimer
88
Lv.38
#89
Muk
89

Route 2, 24, National Park, Viridian Forest
Pokemon: 10
Route 24, 30, 31, Hidden Forest, Ilex Forest, National Park, Viridian Forest, Viridian River, Evolve Caterpie (Lv7)
Pokemon: 11
Route 30, 31, Bond Bridge, Hidden Forest, Ilex Forest, National Park, Evolve Metapod (Lv10)
Pokemon: 12
Route 17 (quest), Route 14, 15, 17, Celadon City, Celadon Sewers, Pokemon Mansion, Power Plant
Pokemon: 88
Route 17 (quest), Route 14, 15, 17, Celadon City, Celadon Sewers, Pokemon Mansion, Evolve Grimer (Lv38)
Pokemon: 89