Gastly sits at the start of its evolution line — not yet at full power, but that changes fast. Most trainers push through to Gengar as fast as possible. Normal and Fighting moves can't touch it, which offsets the 4 weaknesses somewhat. Known as the Gas Pokemon.
Nothing fancy in Gastly's spread. It leans special with Sp. Atk out front. And you'll get 1 Sp. Atk EV per KO for it. Follows a 1.06M XP medium-slow curve.
Born from gases, anyone would faint if engulfed by its gaseous body, which contains poison.
Gastly Weakness
GoodGastly is weak to Ground, Psychic, Ghost, and Dark-type moves. On the flip side, it's immune to Normal and Fighting-type moves entirely. Levitate grants an additional Ground immunity, reshaping the matchup chart. Gastly leans toward special offense (base 100 Sp.Atk) instead of trying to wall anything.
- Fairy type does not exist — Dragon has fewer checks
- Physical / Special split now per-move (introduced Gen IV)
Gastly kicks off a three-stage evolution line through Haunter all the way to Gengar. For breeding, average hatch time with a decent partner pool via one egg group. Evolving adds up to 190 stat points total.
How to Evolve
Breed Gastly easily with 31 breeding partners from the Indeterminate egg group. Pass egg moves like Astonish, Explosion, Fire Punch and 7 more to offspring.
Best Build
No build content available for this Pokemon in Gen 4.
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Egg moves make a real difference. Gastly gets Astonish and Explosion exclusively through breeding, filling gaps that TMs and level-up can't touch. Coverage across 7 types rounds out the picture alongside Sludge Bomb and Shadow Ball.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Transfer Moves
Gastly is available from early-game routes onward at high spawn rates. 10 encounter spots give you plenty of options. Grab one early and it'll be ready to evolve or train by mid-game.
Best Locations
You'll find Gastly across 10 walking encounters from Lv. 13-22, sorted by game progression. Earlier spots show up first so you can grab one as soon as it's reachable.
At 310 BST, Gastly is firmly in pre-evolution territory. Evolve it into Haunter before bringing it to any serious fight.
Gastly evolves into Haunter at level 25. Gastly is the base form in a 3-stage evolutionary line.
Gastly gets Levitate. But Levitate is the one that matters — it's the centerpiece of every viable set. Build around that.
Gastly is a special attacker with base 100 Sp. Atk. Fragile — can't afford to take many hits, too. But the speed tells the real story — base 80 Speed is workable — faster than some, slower than many. Fits the attacker role.
Gastly appears in 22 games, including Yellow, Red & Blue, and Gold & Silver.
Present since Red & Blue, Gastly appears in 22 games spanning 9 generations. Gen 1 originals like Gastly have the longest track record of availability in the series.
- Gen IY
Yellow - Gen IRBDebut
Red & Blue - Gen IIGS
Gold & Silver - Gen IIC
Crystal - Gen IIIRS
Ruby & Sapphire - Gen IIIFRLG
FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS
HeartGold & SoulSilver - Gen IVDP
Diamond & Pearl - Gen VBW
Black & White - Gen VB2W2
Black 2 & White 2 - Gen VIXY
X & Y - Gen VIORAS
Omega Ruby & Alpha Sapphire - Gen VIIUSUM
Ultra Sun & Ultra Moon - Gen VIISM
Sun & Moon - Gen VIILGPE
Let's Go Pikachu & Eevee - Gen VIIISwSh
Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP
Brilliant Diamond & Shining Pearl - Gen IXSV
Scarlet & Violet - Gen IXLZA
Legends: Z-A