Complete Unova sequel guide

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Phase 3: Toxic Badge to Insect Badge — Pokémon Black 2 & White 2 Walkthrough

Explore Castelia, clear the sewers and Relic Passage, and defeat Burgh.

By Damodar Sharma Updated July 12, 2026 Walkthrough

Explore Castelia, clear the sewers and Relic Passage, and defeat Burgh.

Recommended levels 16-24Milestone Insect Badge and TM76 Struggle Bug

Phase route

Completion order

  1. Castelia City — Tour every street, pier, shop, dancer, Medal office, and Battle Company floor.
  2. Castelia Sewers — Partner with Hugh, defeat Plasma, and collect the seasonal sewer encounters.
  3. Relic Passage — Castelia side — Clear the early Relic Passage rooms and hidden items.
  4. Castelia Gym — Burgh — Climb the cocoon elevators and defeat Burgh's mode-dependent Bug team.
  5. Castelia completion sweep — Finish dancers, gifts, shops, medals, massage, and the Royal Unova notes.