Generation 1 · Pokédex profile
Mouse Pokémon
Pokédex entry
A Rattata is cautious in the extreme. Even while it is asleep, it constantly moves its ears and listens for danger. It will make its nest anywhere.
Battle data
Pokédex entry
With its incisors, it gnaws through doors and infiltrates people's homes. Then, with a twitch of its whiskers, it steals whatever food it finds.
Battle data
Conditional evolutions can require additional game-specific prerequisites beyond the displayed method.
| Method | Location | Level | Evidence |
|---|---|---|---|
| Grass / ground | Burned Tower 1f | Lv. 13 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Mansion 1f | Lv. 26–28 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Mansion 2f | Lv. 26–28 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Mansion 3f | Lv. 26–28 | Source-indexed, not individually verified |
| Grass / ground | Pokemon Mansion B1f | Lv. 26 | Source-indexed, not individually verified |
| Grass / ground | Route 1 | Lv. 2–4 | Source-indexed, not individually verified |
| Grass / ground | Route 16 | Lv. 18–22 | Source-indexed, not individually verified |
| Grass / ground | Route 17 | Lv. 22 | Source-indexed, not individually verified |
| Grass / ground | Route 18 | Lv. 22 | Source-indexed, not individually verified |
| Grass / ground | Route 2 | Lv. 2–5 | Source-indexed, not individually verified |
| Grass / ground | Route 22 | Lv. 2–5 | Source-indexed, not individually verified |
| Grass / ground | Route 29 | Lv. 2 | Source-indexed, not individually verified |
| Grass / ground | Route 33 | Lv. 8 | Source-indexed, not individually verified |
| Grass / ground | Route 36 | Lv. 4–5 | Source-indexed, not individually verified |
| Grass / ground | Route 4 | Lv. 8–12 | Source-indexed, not individually verified |
| Grass / ground | Route 46 | Lv. 2–3 | Source-indexed, not individually verified |
| Grass / ground | Route 9 | Lv. 14–17 | Source-indexed, not individually verified |
| Grass / ground | Safari Zone Top Right | Lv. 19–26 | Source-indexed, not individually verified |
| Grass / ground | Sprout Tower 2f | Lv. 3–6 | Source-indexed, not individually verified |
| Grass / ground | Sprout Tower 3f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 2f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 3f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 4f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 5f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 6f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 7f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 8f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tin Tower 9f | Lv. 3–5 | Source-indexed, not individually verified |
| Grass / ground | Tohjo Falls Cavern | Lv. 30 | Source-indexed, not individually verified |
| Rock Smash | Violet City | Lv. 10 | Source-indexed, not individually verified |
| Grass (rare)Form: Rattata Alola | Route 1 | Lv. 3 | 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.