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, and only 3 types hit it super-effectively. 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.
Said to appear in decrepit, deserted buildings. It has no real shape as it appears to be made of a gas.
Gastly Weakness
GoodGastly is weak to Ground, Psychic, and Ghost-type moves. On the flip side, it's immune to Normal and Fighting-type moves entirely. Gastly leans toward special offense (base 100 Sp.Atk) instead of trying to wall anything.
- Only 15 types exist — Dark, Steel, and Fairy are absent
- Ghost has no effect on Psychic (a known bug, fixed in Gen II)
- Special stat governs both offense and defense — no Sp.Atk / Sp.Def split
Gastly evolves into Gengar, but can't breed. At 310 stats as a Ghost/Poison type, evolution is the only path. Evolving adds up to 190 stat points total.
How to Evolve
For an attacker, Gastly wants flexible EVs EVs and an item. The a nature nature tilts toward balanced duty, and an ability contributes without taking a move slot.
Best Build
Best Gastly Moveset
- Explosion
- Hypnosis
- Substitute
- Thunderbolt
Recommended Teammates
Most of Gastly's flexibility comes from TMs. Same-type output runs through Lick and Night Shade, but Psychic and Normal and the rest of the TM pool push it from predictable to genuinely threatening.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Gastly is available from mid-game routes onward at high spawn rates. 5 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 can find Gastly through 5 walking encounters at Lv. 18-29. 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 is a mixed attacker — base 35 Attack and 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