#73.377
Tentacruel/Hydreigon
73.377
#377.73
Hydreigon/Tentacruel
377.73

84(-4)
HP
88(+4)
93(+12)
ATK
81(-12)
81(+8)
DEF
73(-8)
95(-15)
SP.ATK
110(+15)
110(+10)
SP.DEF
100(-10)
98(-1)
SPEED
99(+1)
561(+10)
TOTAL
551(-10)

Regular
Reg.
Levitate: Immune to Ground-type moves, Spikes, Toxic Spikes, and Arena Trap.
Liquid Ooze: Foe's HP draining moves hurts the attacker instead of healing them.
Clear Body: Can't have stats lowered by other Pokémon.Levitate: Immune to Ground-type moves, Spikes, Toxic Spikes, and Arena Trap.
Hidden
HA
Hustle: Physical moves have 1.5x damage and 0.8x accuracy.
Rain Dish: During rainy weather, restore 1/16th max HP each turn.
Clear Body: Can't have stats lowered by other Pokémon.
Liquid Ooze: Foe's HP draining moves hurts the attacker instead of healing them.

x2
DragonFairy
Ground
x1
BugDarkElectricFightingFlyingGhostGrassGroundIceNormalPoisonPsychicRock
BugDragonElectricFairyFightingFireFlyingIceNormalRockSteelWater
x0.5
Steel
DarkGhostGrassPoison
x0.25
FireWater
-
x0
-
Psychic

#72
Tentacool
72
Lv.30
#73
Tentacruel
73
#72
Tentacool
72
Lv.30
#73
Tentacruel
73
#375
Deino
375
Lv.50
#376
Zweilous
376
Lv.64
#377
Hydreigon
377
#375
Deino
375
Lv.50
#376
Zweilous
376
Lv.64
#377
Hydreigon
377

Route 4, 10, 12, 17, 18, 19, 20, 21, 23, 26, 27, 32, 34, 42, Bond Bridge, Boon Island, Brine Road, Celadon Sewers, Cerulean City, Chrono Island, Cinnabar Island, Crimson City, Kin Island, Kindle Road, Knot Island, Offshore Road, Resort Gorgeous, Treasure Beach, Vermillion City, Water Labyrinth
Pokemon: 72
Route 4, 10, 12, 17, 18, 19, 20, 21, 23, 26, 27, 32, 34, 42, Bond Bridge, Boon Island, Cerulean City, Chrono Island, Cinnabar Island, Crimson City, Kin Island, Kindle Road, Knot Island, Offshore Road, Resort Gorgeous, Treasure Beach, Vermillion City, Water Labyrinth, Evolve Tentacool (Lv30)
Pokemon: 73
Safari Zone A3
Pokemon: 375
Evolve Deino (Lv50)
Pokemon: 376
Evolve Zweilous (Lv64)
Pokemon: 377