Phase 3 · Toxic Badge to Insect Badge
Castelia Sewers — Pokémon Black 2 & White 2 Walkthrough
Partner with Hugh, defeat Plasma, and collect the seasonal sewer encounters.
Phase 3 · Toxic Badge to Insect Badge
Partner with Hugh, defeat Plasma, and collect the seasonal sewer encounters.
Walkthrough
- Advance the objective. Follow the section summary and finish required rival, Plasma, Gym, or League battles first.
- Sweep trainers and items. Use the tables below in map order, then make a separate Dowsing Machine pass.
- Set the right filters. Black 2 and White 2 diverge in encounter slots, routes, facilities, and key unlocks; difficulty modes keep distinct boss records.
- Close optional loops. Check Hidden Grottoes, weekday statics, seasonal access, gifts, and postgame prerequisites before leaving.
Pokémon locations
Each area below has its own table, split by encounter method. Rates merge every slot for a species and are shown per season; a single centered rate means all four seasons match. Time of day never changes Black 2/White 2 wild slots. Identical Black 2 and White 2 slots share one row with both game markers.
Castelia Sewers — Castelia Sewers
| Pokémon | Games | Levels | Rate by season | Notes | |||
|---|---|---|---|---|---|---|---|
| Spring | Summer | Autumn | Winter | ||||
| Grass / cave floor | |||||||
| Rattata | B2W2 | 14-17 | 45% | — | |||
| Zubat | B2W2 | 14-17 | 45% | — | |||
| Grimer | B2W2 | 15 or 17 | 10% | — | |||
| Surf | |||||||
| Grimer | B2W2 | 5-15 | 100% | — | |||
| Rippling water (Surf) | |||||||
| Grimer | B2W2 | 5-20 | 95% | — | |||
| Muk | B2W2 | 5-20 | 5% | — | |||
| Fishing | |||||||
| Grimer | B2W2 | 40-70 | 100% | — | |||
| Rippling water (Fishing) | |||||||
| Grimer | B2W2 | 40-60 | 80% | — | |||
| Muk | B2W2 | 50-70 | 20% | — | |||
Castelia Sewers — Castelia Sewers (unknown area 38)
| Pokémon | Games | Levels | Rate by season | Notes | |||
|---|---|---|---|---|---|---|---|
| Spring | Summer | Autumn | Winter | ||||
| Grass / cave floor | |||||||
| Rattata | B2W2 | 14-17 | 45% | — | |||
| Zubat | B2W2 | 14-17 | 45% | — | |||
| Grimer | B2W2 | 15 or 17 | 10% | — | |||
| Surf | |||||||
| Grimer | B2W2 | 5-15 | 100% | — | |||
| Rippling water (Surf) | |||||||
| Grimer | B2W2 | 5-20 | 95% | — | |||
| Muk | B2W2 | 5-20 | 5% | — | |||
| Fishing | |||||||
| Grimer | B2W2 | 40-70 | 100% | — | |||
| Rippling water (Fishing) | |||||||
| Grimer | B2W2 | 60 | 80% | — | |||
| Muk | B2W2 | 70 | 20% | — | |||
Trainers
| Trainer | Mode | Battle | Team | Reward |
|---|---|---|---|---|
 Janitor FelixRoute order | Normal | Single | Lillipup Lv. 16 · Trubbish Lv. 16 (36=カンキチ) | ₽640 |
| Janitor FelixRoute order | Easy | Single | Lillipup Lv. 14 · Trubbish Lv. 14 (36=カンキチ) | ₽560 |
| Janitor FelixRoute order | Challenge | Single | Lillipup Lv. 18 · Trubbish Lv. 18 (36=カンキチ) | ₽720 |
 Doctor HeathRoute order | Normal | Single | Sewaddle Lv. 17 (36=タイゾウ) | ₽1,020 |
| Doctor HeathRoute order | Easy | Single | Sewaddle Lv. 15 (36=タイゾウ) | ₽900 |
| Doctor HeathRoute order | Challenge | Single | Sewaddle Lv. 19 (36=タイゾウ) | ₽1,140 |
 Worker ZackRoute order | Normal | Single | Drilbur Lv. 17 (36=ザック) | ₽680 |
| Worker ZackRoute order | Easy | Single | Drilbur Lv. 15 (36=ザック) | ₽600 |
| Worker ZackRoute order | Challenge | Single | Drilbur Lv. 19 (36=ザック) | ₽760 |
| Worker ScottRoute order | Normal | Single | Timburr Lv. 17 (36=スコット) | ₽640 |
| Worker ScottRoute order | Easy | Single | Timburr Lv. 15 (36=スコット) | ₽520 |
| Worker ScottRoute order | Challenge | Single | Timburr Lv. 19 (36=スコット) | ₽760 |
 Scientist CarolineRoute order | Normal | Single | Grimer Lv. 17 (36=ユウコ) | ₽816 |
| Scientist CarolineRoute order | Easy | Single | Grimer Lv. 15 (36=ユウコ) | ₽720 |
| Scientist CarolineRoute order | Challenge | Single | Grimer Lv. 19 (36=ユウコ) | ₽912 |
 Scientist ClarkeRoute order | Normal | Single | Magnemite Lv. 17 (36=タカアキ) | ₽816 |
| Scientist ClarkeRoute order | Easy | Single | Magnemite Lv. 15 (36=タカアキ) | ₽720 |
| Scientist ClarkeRoute order | Challenge | Single | Magnemite Lv. 19 (36=タカアキ) | ₽912 |
| Janitor BradyRoute order | Normal | Single | Marill Lv. 31 · Cinccino Lv. 31 (36=ムネノリ) | ₽1,240 |
| Janitor BradyRoute order | Easy | Single | Marill Lv. 29 · Cinccino Lv. 29 (36=ムネノリ) | ₽1,160 |
| Janitor BradyRoute order | Challenge | Single | Marill Lv. 33 · Cinccino Lv. 33 (36=ムネノリ) | ₽1,320 |
Items, gifts, and shops
Near the Team Plasma Grunts
one-time unless explicitly statedNear Janitor Felix
one-time unless explicitly statedNorth of Worker Scott
one-time unless explicitly statedNear Worker Scott (requires Surf)
one-time unless explicitly statedNear Doctor Heath
one-time unless explicitly statedFrom Hugh after defeating the Team Plasma Grunts
one-time unless explicitly statedWest of the Relic Passage entrance
one-time unless explicitly statedWest of Janitor Felix (requires Surf)
one-time unless explicitly statedWest of Scientist Clarke (requires Surf)
one-time unless explicitly statedWest of Max Repel (requires Surf)
one-time unless explicitly statedReceived from female Scientist
one-time unless explicitly statedReceived from female Scientist
one-time unless explicitly statedReceived from female Scientist
one-time unless explicitly statedReceived from male Scientist (requires Surf)
one-time unless explicitly statedReceived from male Scientist (requires Surf)
one-time unless explicitly statedReceived from male Scientist (requires Surf)
one-time unless explicitly stated