Gastly is a PokeBonk League partner of uncommon rarity and Ghost / Poison type. Its unlock challenge counts from your first run, with no League members needed. During a run it evolves into Haunter (Lv. 30) → Gengar (Lv. 42).
- Passive
- Takes less damage; higher evasion.
- How to unlock
- Trigger 600 elemental reactions in a single run.
- League members needed
- None
- Evolution
- Gastly → Haunter (Lv. 30) → Gengar (Lv. 42)
Partner data comes from community testing on v0.7.7 (2026-10-20), before Season 2. The game is now on v0.8.28, so some challenges may have changed since, and we re-check them as we play.
Moves and fusions for Gastly
- Signature fusion: Gloomy Curse, from Shadow Ball + Hex at max level in Bill's Machine.
- Two maxed Ghost moves fuse into Spectral Parade, the Ghost type fusion, an easy target that fits Gastly's type.
- Two maxed Poison moves fuse into Toxic Swamp, the Poison type fusion, an easy target that fits Gastly's type.
- Toxic Combustion is a reaction fusion from a Poison move and a Fire move.
- Eternal Sleep is a reaction fusion from a Psychic / Grass move and a Ghost / Dark move.
Plan a build with Gastly All move fusions →
Unlock alongside Gastly
These partners' challenges count the same thing as Gastly's (elemental reactions), so the same runs move all of them forward.
- Koffing: Trigger 5,000 elemental reactions.
- Porygon: Trigger 1,200 elemental reactions in a single run.
Other Poison partners
Bulbasaur · Weedle · Ekans · Nidoran♀ · Nidoran♂ · Zubat · Oddish · Venonat · Bellsprout · Tentacool · Grimer · Koffing
How do I unlock Gastly in PokeBonk?
Trigger 600 elemental reactions in a single run.
What type is Gastly in PokeBonk?
Ghost / Poison. Takes less damage; higher evasion.
When does Gastly evolve in PokeBonk?
Gastly → Haunter (Lv. 30) → Gengar (Lv. 42).