Generation 1 · Pokédex profile
Cocoon Pokémon
Pokédex entry
It remains virtually immobile while it clings to a tree. However, on the inside, it busily prepares for evolution. This is evident from how hot its shell becomes.
Battle data
Conditional evolutions can require additional game-specific prerequisites beyond the displayed method.
| Method | Location | Level | Evidence |
|---|---|---|---|
| Grass / ground | Ilex Forest | Lv. 9 | Source-indexed, not individually verified |
| Grass / ground | National Park Bug Contest | Lv. 17 | Source-indexed, not individually verified |
| Grass / ground | Route 24 | Lv. 8 | Source-indexed, not individually verified |
| Grass / ground | Route 25 | Lv. 9 | Source-indexed, not individually verified |
| Grass / ground | Six Island Pattern Bush | Lv. 9 | Source-indexed, not individually verified |
| Grass / ground | Viridian Forest | Lv. 4–6 | 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.