#25.32
Pikachu/Nidoran♂
25.32
#32.25
Nidoran♂/Pikachu
32.25

38(-4)
HP
42(+4)
56(+1)
ATK
55(-1)
36(+3)
DEF
33(-3)
46(+3)
SP.ATK
43(-3)
40
SP.DEF
40
63(-13)
SPEED
76(+13)
279(-10)
TOTAL
289(+10)

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.
Static: On contact, the attacker has a 30% chance to be paralyzed.
Hidden
HA
Hustle: Physical moves have 1.5x damage and 0.8x accuracy.
Lightning Rod: Absorbs Electric-type moves to gain a SP.ATK stage.

x4
Ground
x4
x2
Psychic
x2
x1
DarkDragonFireGhostIceNormalRockWater
x1
x0.5
BugElectricFairyFightingFlyingGrassPoisonSteel
x0.5

#172
Pichu
172
Lv.15
#25
Pikachu
25
Thunder Stone
#26
Raichu
26
#172
Pichu
172
Lv.15
#25
Pikachu
25
Thunder Stone
#26
Raichu
26
#32
Nidoran♂
32
Lv.16
#33
Nidorino
33
Moon Stone
#34
Nidoking
34
#32
Nidoran♂
32
Lv.16
#33
Nidorino
33
Moon Stone
#34
Nidoking
34

Kanto Daycare (gift), Viridian Forest
Pokemon: 172
Route 6, 7, Hidden Forest, Power Plant, Evolve Pichu (Lv15)
Pokemon: 25
Cerulean Cave, Evolve Pikachu (Thunder Stone)
Pokemon: 26
Route 3, 9, 22, Safari Zone A1, A2, A3
Pokemon: 32
Route 9, 35, 36, Safari Zone A1, A2, A3, A4, Viridian River, Evolve Nidoran♂ (Lv16)
Pokemon: 33
Evolve Nidorino (Moon Stone)
Pokemon: 34