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.
Gaseous and completely impalpable. Also highly dangerous— inhaling part of its poisonous body will cause one to faint instantly.
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. The Ghost/Poison typing picks up 4 resistances to work with. 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.
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 19 breeding partners from the Indeterminate egg group.
Best Build
Legends: Arceus uses different battle mechanics.
Competitive build content is not applicable for this game. Select a main series game for builds.
The offense anchors on Sludge Bomb and Shadow Ball, with coverage across 7 types adding reach. It's a workable movepool for Gastly that handles most situations. Energy Ball and Psychic give it enough punch where it matters.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
A handful of locations for Gastly with decent spawn rates across mid-game routes. The sort toggle below swaps between best odds and earliest access, so you can approach it based on where you are in the game.
Best Locations
You can find Gastly through 7 walking encounters at walking. The list is sorted by game progression, so the earliest accessible spots show up first.
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