#1.30
Bulbasaur/Nidorina
1.30
#30.1
Nidorina/Bulbasaur
30.1

53(-8)
HP
61(+8)
57(+4)
ATK
53(-4)
61(+6)
DEF
55(-6)
61(+3)
SP.ATK
58(-3)
61(+3)
SP.DEF
58(-3)
52(+4)
SPEED
48(-4)
345(+12)
TOTAL
333(-12)

Regular
Reg.
Poison Point: On contact, the attacker has a 30% chance to be poisoned.
Rivalry: Inflicts 1.25x damage against the same gender and 0.75× to the opposite gender. Doesn't work if either Pokémon is genderless.
Overgrow: When it has 1/3rd or less max HP, Grass-type moves have 1.5x power.
Hidden
HA
Hustle: Physical moves have 1.5x damage and 0.8x accuracy.
Chlorophyll: SPEED is doubled in sunny weather.

x2
FireFlyingIcePsychic
x2
x1
BugDarkDragonGhostGroundNormalPoisonRockSteel
x1
x0.5
ElectricFairyFightingWater
x0.5
x0.25
Grass
x0.25

#1
Bulbasaur
1
Lv.16
#2
Ivysaur
2
Lv.32
#3
Venusaur
3
#1
Bulbasaur
1
Lv.16
#2
Ivysaur
2
Lv.32
#3
Venusaur
3
#29
Nidoran♀
29
Lv.16
#30
Nidorina
30
Moon Stone
#31
Nidoqueen
31
#29
Nidoran♀
29
Lv.16
#30
Nidorina
30
Moon Stone
#31
Nidoqueen
31

Pallet Town (starter) (gift), Cerulean City (trade), Viridian River (static)
Pokemon: 1
Evolve Bulbasaur (Lv16)
Pokemon: 2
Evolve Ivysaur (Lv32)
Pokemon: 3
Route 3, 9, 22, Safari Zone A1, A3
Pokemon: 29
Route 9, 35, 36, Safari Zone A1, A2, A3, A4, Viridian River, Evolve Nidoran♀ (Lv16)
Pokemon: 30
Evolve Nidorina (Moon Stone)
Pokemon: 31