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.
With its gas-like body, it can sneak into any place it desires. However, it can be blown away by wind.
Its body is made of gas. Despite lacking substance, it can envelop an opponent of any size and cause suffocation.
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, Disable, Explosion and 8 more to offspring.
Best Build
No build content available for this Pokemon in Gen 4.
Try selecting a different game/generation filter, or check back later.
Egg moves make a real difference. Gastly gets Astonish and Disable 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. 4 encounter spots give you plenty of options. Grab one early and it'll be ready to evolve or train by mid-game.
Best Locations
4 walking encounters at Lv. 3-22 for Gastly across HeartGold and SoulSilver. A few locations are version-exclusive, so your copy of the game affects what's available.
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 leaning toward the special side (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