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.
Almost invisible, this gaseous POKéMON cloaks the target and puts it to sleep without notice.
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
high spawn rates in mid-game routes across 10 locations. Gastly's one of the easier catches on the list. Knock it out fast and save your time for harder targets.
Best Locations
10 spots to find Gastly at Lv. 18-24 via walking. Not all of them exist in both Blue and Red versions, so filter by your copy below.
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