The museum is reached through the northern caves of Rocky Ridges. Its entrance is beyond the smelting-furnace area and magma, rather than an ordinary street door. Bring blocks and Rock Smash; Strength is useful for the bookshelf hiding the separate room inside.
Follow the mine route in stages
- Enter the northern cave and continue past the room where the story's smelting furnace stood. Cross the magma using a block path, cooled surfaces made with Water Gun or Glide if already learned.
- In the magma section, inspect the brown rock barrier along the route. Open it with Rock Smash to reach the closed-off tunnel and its crystal deposits, then return to the main route toward the museum.
- Enter the museum and follow the ground-floor red carpet toward the back. Move the large bookshelf away from the wall with Strength to reveal the opening and descend into the hidden room.
Read the record before leaving
Inspect the record in the concealed room to register the fifth Team Rocket grunt diary entry. It is a separate find from the museum's displays and Gimmighoul. Picking up an unrelated book on an upper floor will not register this hidden-room record.
Keep the two hidden entrances distinct
The crystal tunnel branches off the mine; the diary room is behind the bookshelf inside the museum. If you only find crystals, continue to the museum rather than assuming the diary failed to appear. If a barrier resists, check your tool or meal boost before digging away a large unrelated wall.
