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Pokémon: Brilliant Diamond & Shining Pearl

Mt. Coronet (Side Tunnel)

Vincent Lau

This page is a guide for exploring the side tunnel of Mt. Coronet, accessible via the peak exterior.

You can reach the side tunnel by entering the side cave towards the north-east of the peak exterior. After cutting through the peak interior, head north and then go down the stairs on the left. It’s a bit hard to see, but there’s a cave on the right side, a few paces up the narrow path.


Map of the Mt. Coronet side tunnel.

When you enter, use Rock Climb to descend into the main body of the tunnel. If you haven’t visited the Spear Pillar yet, there will be some Team Galactic goons roaming around. At this point, the tunnel exit will be blocked, but you can fight the Galactic grunts for experience.

Once Team Galactic has left Mt. Coronet, you can pass through the tunnel via the exit towards the far north, at the lowest level of the tunnel. You can get there by using Rock Climb to descend further down, then make your way north. Or you could go the long way around by heading east, then north.

The northern exit will lead towards the southern part of Center: 1F, where you can grab TM02 Dragon Claw. From there, you can use Strength to return to the main section of Center: 1F.

Pokémon Encounters

Wild Pokémon - Ground

Pokémon Type Encounter Rate
437.pngBronzong pokemon_bdsp_steel17.pngpokemon_bdsp_psychic17.png 5%
433.pngChingling pokemon_bdsp_psychic17.png 10%
35.pngClefairy pokemon_bdsp_fairy17.png 15%
42.pngGolbat pokemon_bdsp_poison17.pngpokemon_bdsp_flying17.png 10%
75.pngGraveler pokemon_bdsp_rock17.pngpokemon_bdsp_ground17.png 40%
67.pngMachoke pokemon_bdsp_fighting17.png 10%
308.pngMedicham pokemon_bdsp_fighting17.pngpokemon_bdsp_psychic17.png 10%

Trainer Battles

Team Galactic Grunt (H)

Pokémon Level Type
42.pngGolbat 40 pokemon_bdsp_poison17.pngpokemon_bdsp_flying17.png

Team Galactic Grunt (I)

Pokémon Level Type
265.pngWurmple 34 pokemon_bdsp_bug17.png
266.pngSilcoon 36 pokemon_bdsp_bug17.png
267.pngBeautifly 38 pokemon_bdsp_bug17.pngpokemon_bdsp_flying17.png

Team Galactic Grunt (J)

Pokémon Level Type
453.pngCroagunk 35 pokemon_bdsp_poison17.pngpokemon_bdsp_fighting17.png
434.pngStunky 38 pokemon_bdsp_poison17.pngpokemon_bdsp_dark17.png
453.pngCroagunk 38 pokemon_bdsp_poison17.pngpokemon_bdsp_fighting17.png


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Guide Information

  • Publisher
    Pokemon Company International
  • Platforms
  • Genre
  • Guide Release
    29 October 2021
  • Last Updated
    29 November 2021
    Version History
  • Guide Author

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This strategy guide for Pokémon Brilliant Diamond & Shining Pearl contains all the information Pokémon trainers will need to complete the game and catch every single Pokémon!

In this remake of the classic Pokémon Diamond & Pearl, you’ll journey through the mystical Sinnoh region to become a Pokémon master. Along the way, you’ll confront the scheming Team Galactic and witness the awesome power of the Legendary Dialga or Palkia.

The current pre-release version of our guide contains:

  • Tips for Adventuring in Sinnoh.
  • Tips for Pokémon battling.
  • An introduction to the Grand Underground.
  • An introduction to Super Contest Shows.

The finished version of our guide will contain:

  • A complete walkthrough of the main story and postgame.
    – Strategies for defeating the Gym Leaders and Elite Four.
    – Wild Pokémon and item locations for each route and dungeon.
  • A full breakdown of the Grand Underground.
    – All the Pokémon that inhabit the Hideways.
    – Information for all the treasure you can dig up.
  • A full guide for Super Contest Shows.
    – How to cook the best quality Poffins.
  • Explanation of advanced mechanics, such as IVs and EVs.
  • How to breed Pokémon.
  • A detailed Sinnoh region Pokédex.

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