Navigating Iron Island in Pokémon Brilliant Diamond and Shining Pearl requires precise routing, resource management, and help from Riley to conquer its multi-level cavern. Located off the coast of Canalave City, this optional dungeon serves as a high-level training ground and a mandatory stop for securing the Metal Coat, the Shiny Stone, and crucial TMs. If you're trying to clear every room, collect every hidden item, and team up with Riley without wasting Max Potions, you're in the right place.
To reach Iron Island, board the boat from the dock in Canalave City after earning your sixth gym badge from Byron. You don't need a Razor Fang or an Iron Ball to trigger the ride, despite common misconceptions online. Once you step off the boat, you're locked into the cave system until you progress through the introductory event with Riley, who gifts you a Lucario egg (Riolu) and pairs up with your party for multi-battles.
Riley Partnership and Multi-Battles
As soon as you enter the cave, you'll run into Riley near the elevator. He joins your party as an active NPC partner, turning every single wild encounter and trainer battle into a two-on-two double battle.
This partnership offers a massive mechanical advantage: Riley's Lucario heals your active Pokémon's HP and PP fully after every single battle. You never need to use a single Revive or Full Restore while he's by your side. Use this mechanic to aggressively level up your weaker team members without burning through your item inventory.
To dismiss Riley and clear the dungeon solo for remaining item pickups, you must escort him to the exit near the bottom floor after defeating the two Galactic Grunts. Make sure you collect every item before triggering that final exit cutscene, or you'll have to retrace your steps alone.
Iron Island Walkthrough and Floor Layout
Iron Island consists of an exterior dock, an interior foyer, a basement floor with multiple interconnecting tunnels, and a deep interior sector occupied by Team Galactic.
Basement 1 and Basement 2
From the main entrance lobby, take the elevator down to Basement 1. You'll navigate a series of narrow metal catwalks and stone corridors.
- Head west past the first pair of Steel-type trainers to find a hidden Max Elixir tucked away near the corner crates.
- Descend the stairs to Basement 2. The path splits into an upper ledge and a lower tunnel network.
- Take the upper route to locate a Shiny Stone, which you can use to evolve Togetic or Roselia.
- Battle the pair of Workers blocking the elevator shaft to unlock the shortcut down to the lower subterranean level.
Basement 3: The Galactic Operation
The deepest accessible sector of the cave houses a small operation run by Team Galactic grunts experimenting on local Pokémon.
- Work your way through the northern tunnels with Riley. You will face two consecutive Galactic Grunts using Golbat and Toxicroak.
- Once you defeat them, they flee the island, leaving behind a Metal Coat on the ground nearby.
- Talk to Riley immediately after the scuffle to receive the Riolu Egg, provided you have an open slot in your active party.
Complete Item Checklist
Iron Island hides numerous valuable items across its dark tunnels. Missing a single corner means missing evolution stones and competitive items.
- Metal Coat: Found directly after defeating the two Team Galactic Grunts in the deep basement.
- Shiny Stone: Located on an upper ledge in Basement 2, guarded by a Worker.
- Elixir: Hidden in the upper northeast corner of the main entrance cavern.
- Dusk Stone: Situated near a dead-end tunnel on the eastern side of Basement 2.
- Iron: Found in a small side alcove on Basement 1.
- TM23 (Iron Tail): Awarded by Riley when you complete your journey together and exit the cave structure.
Wild Pokémon Encounters
The cavern features unique Steel and Psychic encounters that are difficult to find anywhere else in the mid-game Sinnoh region.
- Bronzor: Found commonly across all interior floors around level 35 to Level 38. Useful for players building defensive type cores.
- Onix: Spawns frequently in the lower basement rock tunnels.
- Golbat: Roams the dark corridors of Basements 2 and 3.
- Steelix: A rare high-level spawn in the deepest chambers for players with the National Pokédex unlocked.
Frequently Asked Questions
Do I need HM Strength to complete Iron Island?
No, HM Strength isn't mandatory to complete the core storyline event with Riley, but you need it pushed and cleared to access several optional item balls tucked behind boulder puzzles in Basement 2.
Can I get more than one Riolu Egg?
No, Riley only hands out a single Riolu egg per playthrough. If your party is full when you speak to him after the Galactic event, you must clear a space in your box or party before he gives it to you.
What level should my team be before entering?
Aim for an average party level of 42 to 46. While Riley heals your HP and PP after every fight, your team still needs to output enough offensive pressure to win double battles against double-target moves.
Where do I use the Metal Coat found here?
Trade a Scyther or an Onix holding the Metal Coat to evolve them into Scizor or Steelix respectively. You can also use it as a held item to boost Steel-type attacks by twenty percent.
