Phase 10 section
Pokemon FireRed and LeafGreen Cerulean Cave and Mewtwo Walkthrough
Cerulean Cave and Mewtwo section for the FireRed and LeafGreen walkthrough with source-backed wild Pokemon, trainers, items, hidden items, bosses, and route notes.
After fixing the Network Machine, enter Cerulean Cave, sweep high-level wild tables, and catch Mewtwo. This page is a standalone section for Phase 10: Post-Game Sevii Islands, with FireRed/LeafGreen source data for encounters, trainers, items, hidden items, and boss routing.
Source maps
Cerulean Cave 1F, Cerulean Cave 2F, and Cerulean Cave B1F.
Wild rows95 Trainers0 Items9
Route plan
Bring Ultra Balls/Timer Balls, status, Surf, and Escape Rope. Mewtwo is Lv. 70 on B1F.
Route Notes
- Cerulean Cave opens after the post-game Network Machine and National Dex conditions are satisfied.
Wild Pokemon
| Area / subarea | Game | Method | Pokemon | Level | Odds | Condition / requirement |
|---|---|---|---|---|---|---|
| Cerulean Cave 1F | FireRed/LeafGreen | Good Rod |  Goldeen | Lv. 5-15 | 20% | Cerulean Cave 1F Good Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Good Rod |  Magikarp | Lv. 5-15 | 20% | Cerulean Cave 1F Good Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Good Rod |  Poliwag | Lv. 5-15 | 60% | Cerulean Cave 1F Good Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Ditto | Lv. 52 | 10% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor | Ditto | Lv. 61 | 1% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Electrode | Lv. 58 | 5% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Golbat | Lv. 46 | 10% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor | Golbat | Lv. 55 | 4% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Machoke | Lv. 46 | 10% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Magneton | Lv. 49 | 20% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Parasect | Lv. 49 | 20% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor | Parasect | Lv. 58 | 5% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Primeape | Lv. 52 | 10% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor | Primeape | Lv. 61 | 1% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Grass/cave floor |  Wobbuffet | Lv. 55 | 4% | Cerulean Cave 1F Grass/cave floor slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Old Rod | Magikarp | Lv. 5 | 70% | Cerulean Cave 1F Old Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Old Rod | Magikarp | Lv. 5 | 30% | Cerulean Cave 1F Old Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Rock Smash |  Geodude | Lv. 30-40 | 60% | Cerulean Cave 1F Rock Smash slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 40-50 | 4% | Cerulean Cave 1F Rock Smash slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 40-50 | 1% | Cerulean Cave 1F Rock Smash slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Rock Smash |  Graveler | Lv. 40-50 | 30% | Cerulean Cave 1F Rock Smash slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Rock Smash | Graveler | Lv. 45-55 | 5% | Cerulean Cave 1F Rock Smash slot. |
| Cerulean Cave 1F | FireRed/LeafGreen | Super Rod |  Gyarados | Lv. 15-25 | 15% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Super Rod | Poliwag | Lv. 15-25 | 40% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | FireRed/LeafGreen | Super Rod |  Poliwhirl | Lv. 20-30 | 40% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | FireRed | Super Rod |  Psyduck | Lv. 15-25 | 4% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | FireRed | Super Rod | Psyduck | Lv. 25-35 | 1% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | LeafGreen | Super Rod |  Slowpoke | Lv. 15-25 | 4% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | LeafGreen | Super Rod | Slowpoke | Lv. 25-35 | 1% | Cerulean Cave 1F Super Rod table. |
| Cerulean Cave 1F | FireRed | Surf |  Golduck | Lv. 40-50 | 30% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | FireRed | Surf | Golduck | Lv. 45-55 | 5% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | FireRed | Surf | Psyduck | Lv. 30-40 | 60% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | FireRed | Surf | Psyduck | Lv. 40-50 | 4% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | FireRed | Surf | Psyduck | Lv. 40-50 | 1% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | LeafGreen | Surf |  Slowbro | Lv. 40-50 | 30% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | LeafGreen | Surf | Slowbro | Lv. 45-55 | 5% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | LeafGreen | Surf | Slowpoke | Lv. 30-40 | 60% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | LeafGreen | Surf | Slowpoke | Lv. 40-50 | 4% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 1F | LeafGreen | Surf | Slowpoke | Lv. 40-50 | 1% | Cerulean Cave 1F Surf slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Ditto | Lv. 55 | 10% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Ditto | Lv. 64 | 1% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Electrode | Lv. 61 | 4% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Golbat | Lv. 49 | 20% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Golbat | Lv. 58 | 5% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor |  Kadabra | Lv. 55 | 10% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Kadabra | Lv. 64 | 1% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Machoke | Lv. 49 | 20% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Magneton | Lv. 52 | 10% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Parasect | Lv. 52 | 10% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Parasect | Lv. 61 | 4% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Grass/cave floor | Wobbuffet | Lv. 58 | 5% | Cerulean Cave 2F Grass/cave floor slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 35-45 | 60% | Cerulean Cave 2F Rock Smash slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 45-55 | 4% | Cerulean Cave 2F Rock Smash slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 45-55 | 1% | Cerulean Cave 2F Rock Smash slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Rock Smash | Graveler | Lv. 45-55 | 30% | Cerulean Cave 2F Rock Smash slot. |
| Cerulean Cave 2F | FireRed/LeafGreen | Rock Smash | Graveler | Lv. 50-60 | 5% | Cerulean Cave 2F Rock Smash slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Good Rod | Goldeen | Lv. 5-15 | 20% | Cerulean Cave B1F Good Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Good Rod | Magikarp | Lv. 5-15 | 20% | Cerulean Cave B1F Good Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Good Rod | Poliwag | Lv. 5-15 | 60% | Cerulean Cave B1F Good Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Ditto | Lv. 58 | 20% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Ditto | Lv. 67 | 5% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Electrode | Lv. 64 | 4% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Golbat | Lv. 52 | 10% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Golbat | Lv. 61 | 1% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Kadabra | Lv. 58 | 20% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Kadabra | Lv. 67 | 5% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Machoke | Lv. 52 | 10% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Magneton | Lv. 55 | 10% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Parasect | Lv. 55 | 10% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Parasect | Lv. 64 | 4% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Grass/cave floor | Wobbuffet | Lv. 61 | 1% | Cerulean Cave B1F Grass/cave floor slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Old Rod | Magikarp | Lv. 5 | 70% | Cerulean Cave B1F Old Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Old Rod | Magikarp | Lv. 5 | 30% | Cerulean Cave B1F Old Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 40-50 | 60% | Cerulean Cave B1F Rock Smash slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 50-60 | 4% | Cerulean Cave B1F Rock Smash slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Rock Smash | Geodude | Lv. 50-60 | 1% | Cerulean Cave B1F Rock Smash slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Rock Smash | Graveler | Lv. 50-60 | 30% | Cerulean Cave B1F Rock Smash slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Rock Smash | Graveler | Lv. 55-65 | 5% | Cerulean Cave B1F Rock Smash slot. |
| Cerulean Cave B1F | FireRed/LeafGreen | Static encounter |  Mewtwo | Lv. 70 | Static | One-time scripted encounter in Cerulean Cave B1F. |
| Cerulean Cave B1F | FireRed/LeafGreen | Super Rod | Gyarados | Lv. 15-25 | 15% | Cerulean Cave B1F Super Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Super Rod | Gyarados | Lv. 25-35 | 1% | Cerulean Cave B1F Super Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Super Rod | Poliwag | Lv. 15-25 | 40% | Cerulean Cave B1F Super Rod table. |
| Cerulean Cave B1F | FireRed/LeafGreen | Super Rod | Poliwhirl | Lv. 20-30 | 40% | Cerulean Cave B1F Super Rod table. |
| Cerulean Cave B1F | FireRed | Super Rod | Psyduck | Lv. 15-25 | 4% | Cerulean Cave B1F Super Rod table. |
| Cerulean Cave B1F | LeafGreen | Super Rod | Slowpoke | Lv. 15-25 | 4% | Cerulean Cave B1F Super Rod table. |
| Cerulean Cave B1F | FireRed | Surf | Golduck | Lv. 50-60 | 30% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | FireRed | Surf | Golduck | Lv. 55-65 | 5% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | FireRed | Surf | Psyduck | Lv. 40-50 | 60% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | FireRed | Surf | Psyduck | Lv. 50-60 | 4% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | FireRed | Surf | Psyduck | Lv. 50-60 | 1% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | LeafGreen | Surf | Slowbro | Lv. 50-60 | 30% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | LeafGreen | Surf | Slowbro | Lv. 55-65 | 5% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | LeafGreen | Surf | Slowpoke | Lv. 40-50 | 60% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | LeafGreen | Surf | Slowpoke | Lv. 50-60 | 4% | Cerulean Cave B1F Surf slot. |
| Cerulean Cave B1F | LeafGreen | Surf | Slowpoke | Lv. 50-60 | 1% | Cerulean Cave B1F Surf slot. |
Trainers
No regular trainers are sourced for this section.
Items And Hidden Items
| Item | Type | Area / direction | Coordinate | Requirement |
|---|---|---|---|---|
| Full Restore | Visible item ball | Cerulean Cave 1F: Visible item ball in Cerulean Cave 1F; check around tile (11, 16). | 11, 16 | HIDE CERULEAN CAVE 1F FULL RESTORE |
| Max Elixir | Visible item ball | Cerulean Cave 1F: Visible item ball in Cerulean Cave 1F; check around tile (25, 5). | 25, 5 | HIDE CERULEAN CAVE 1F MAX ELIXIR |
| Nugget | Visible item ball | Cerulean Cave 1F: Visible item ball in Cerulean Cave 1F; check around tile (7, 3). | 7, 3 | HIDE CERULEAN CAVE 1F NUGGET |
| Ultra Ball | Hidden item | Cerulean Cave 1F: Hidden in Cerulean Cave 1F; press A on the tile around (12, 2). | 12, 2 | Use the Itemfinder or check the described tile. |
| Full Restore | Visible item ball | Cerulean Cave 2F: Visible item ball in Cerulean Cave 2F; check around tile (33, 12). | 33, 12 | HIDE CERULEAN CAVE 2F FULL RESTORE |
| PP Up | Visible item ball | Cerulean Cave 2F: Visible item ball in Cerulean Cave 2F; check around tile (9, 18). | 9, 18 | HIDE CERULEAN CAVE 2F PP UP |
| Ultra Ball | Visible item ball | Cerulean Cave 2F: Visible item ball in Cerulean Cave 2F; check around tile (29, 16). | 29, 16 | HIDE CERULEAN CAVE 2F ULTRA BALL |
| Max Revive | Visible item ball | Cerulean Cave B1F: Visible item ball in Cerulean Cave B1F; check around tile (32, 2). | 32, 2 | HIDE CERULEAN CAVE B1F MAX REVIVE |
| Ultra Ball | Visible item ball | Cerulean Cave B1F: Visible item ball in Cerulean Cave B1F; check around tile (31, 9). | 31, 9 | HIDE CERULEAN CAVE B1F ULTRA BALL |
Boss Strategy
No major boss card is assigned to this section.
Completion Checklist
- Clear the route plan for Cerulean Cave and Mewtwo before moving to the next section.
- Check the wild table for FireRed/LeafGreen version splits, rod methods, Surf, Rock Smash, static Pokemon, gifts, trades, and event-only rows when present.
- Defeat or intentionally skip optional trainers; use VS Seeker notes where rematches are available.
- Sweep visible and hidden item rows, including key items, HMs, TMs, berries, fossils, and scripted gifts.
- Review boss cards and heal before any Rival, Gym Leader, Rocket Admin, Elite Four, Champion, or legendary encounter listed above.
Sources
pret/pokefirered:src/data/wild_encounters.json,src/data/trainers.h,src/data/trainer_parties.h,data/maps/*/map.json,data/maps/*/scripts.inc,data/scripts/item_ball_scripts.inc, andgraphics/trainers/front_pics.- Encounter odds use the FR/LG slot rates: land 20/20/10/10/10/10/5/5/4/4/1/1, Surf and Rock Smash 60/30/5/4/1, Old Rod 70/30, Good Rod 60/20/20, and Super Rod 40/40/15/4/1.
- Generation III mechanics apply throughout: abilities, natures, held items, double battles, and post-game National Dex data are active in these remakes.