Generation 1 · Pokédex profile
River Crab Pokémon
Pokédex entry
Krabby live in holes dug into beaches. On sandy shores with little in the way of food, they can be seen squabbling with each other over territory.
Battle data
Conditional evolutions can require additional game-specific prerequisites beyond the displayed method.
| Method | Location | Level | Evidence |
|---|---|---|---|
| Fishing | Cerulean City | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Cherrygrove City | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Cinnabar Island | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Five Island | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Five Island Meadow | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Five Island Memorial Pillar | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Five Island Resort Gorgeous | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Five Island Water Labyrinth | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Four Island Icefall Cave Back | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Olivine City | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | One Island | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | One Island Kindle Road | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | One Island Treasure Beach | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Pallet Town | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 10 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 11 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 12 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 13 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 19 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 20 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 21 North | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 21 South | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 24 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 34 | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Route 4 | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Route 40 | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Safari Zone Low Mid | Lv. 19–26 | Source-indexed, not individually verified |
| Fishing | Safari Zone Top Mid | Lv. 19–26 | Source-indexed, not individually verified |
| Fishing | Safari Zone Top Right | Lv. 19–26 | Source-indexed, not individually verified |
| Fishing | Seafoam Islands B3f | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Seafoam Islands B4f | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Seven Island Tanoby Ruins | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Seven Island Trainer Tower | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Six Island Green Path | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Six Island Outcast Island | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Six Island Water Path | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Ssanne Exterior | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Three Island Bond Bridge | Lv. 5–25 | Source-indexed, not individually verified |
| Fishing | Vermilion City | Lv. 5–15 | Source-indexed, not individually verified |
| Fishing | Whirl Islands 1f | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Whirl Islands B1f | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Whirl Islands B2f | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Whirl Islands B3f | Lv. 10–40 | Source-indexed, not individually verified |
| Fishing | Whirl Islands Descent | Lv. 10–40 | Source-indexed, not individually verified |
| Grass / ground | Cliff Edge Cave | Lv. 23–25 | Source-indexed, not individually verified |
| Grass / ground | Safari Zone Top Right | Lv. 19–26 | Source-indexed, not individually verified |
| Grass / ground | Whirl Islands 1f | Lv. 26–27 | Source-indexed, not individually verified |
| Grass / ground | Whirl Islands B1f | Lv. 26–27 | Source-indexed, not individually verified |
| Grass / ground | Whirl Islands B1f Inner | Lv. 26–27 | Source-indexed, not individually verified |
| Rock Smash | Cliff Edge Cave | Lv. 23 | Source-indexed, not individually verified |
| Surfing | Seafoam Islands B3f | Lv. 25–30 | Source-indexed, not individually verified |
| Surfing | Seafoam Islands B4f | Lv. 25–30 | 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.