Generation 1 · Pokédex profile
Gas Pokémon
Pokédex entry
If a Haunter beckons you while it is floating in darkness, don't approach it. This Pokémon will try to lick you with its tongue and steal your life away.
Battle data
Conditional evolutions can require additional game-specific prerequisites beyond the displayed method.
| Method | Location | Level | Evidence |
|---|---|---|---|
| Grass / ground | Five Island Lost Cave Room1 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room10 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room11 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room12 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room13 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room14 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room2 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room3 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room4 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room5 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room6 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room7 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room8 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Five Island Lost Cave Room9 | Lv. 44–52 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Tower 3f | Lv. 20 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Tower 4f | Lv. 20 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Tower 5f | Lv. 20 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Tower 6f | Lv. 21–23 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Tower 7f | Lv. 23–25 | Source-indexed, not individually verified |
| Grass / ground | Safari Zone Top Mid | Lv. 19–26 | Source-indexed, not individually verified |
Rare grass and Surfing encounters inherit the first native slot's level range. Supplemental fishing follows each rod's native slots. These ranges exclude Lure effects and randomizer replacements; eligibility restrictions still apply.
Data source: configured Grand Anthology Gen 1–9 species, forms and abilities. The website uses frame-cropped copies of the game's existing Pokémon sprites, which remain franchise/artist-owned assets. Some alternate forms use labeled default-form artwork when their individual sprite is unavailable. See acknowledgments for credits.