Exploring the expansive post-game content in Pokemon HeartGold leads trainers back to the historic Kanto region, where fresh challenges await. One of the most iconic stops on this nostalgic journey is Pewter City, home of the Boulder Badge and the famous Rock-type Gym Leader, Brock. Navigating the inter-regional routes can sometimes confuse players who are eager to challenge the old-school gyms.
Arriving in Kanto and Reaching Vermilion City
Your journey to the northern areas of Kanto begins immediately after you defeat the Johto Elite Four and claim the championship title. Professor Elm will award you the S.S. Ticket, which grants you access to the luxury liner S.S. Aqua waiting in Olivine City. Boarding this ship allows you to sail directly to Vermilion City, serving as your primary gateway into the new region.
Once you step off the docks, you must focus on solving the local power crisis to unlock the region's full transit system. Head north toward Saffron City and Cerulean City to track down the missing Power Plant component stolen by a rogue Rocket Grunt. Restoring power to the Kanto grid is essential for clearing the paths that ultimately lead to the northwestern territories.
Navigating the Depths of Digletts Cave
The absolute fastest way to reach the isolated northwestern corner of the map is by utilizing a subterranean shortcut. Diglett's Cave is located just east of Vermilion City and offers a direct path underneath the mountain barriers. Before entering, ensure you have a Pokemon equipped with the Cut hidden machine to clear the obstacles waiting at the exit.
Traveling through the tunnel will bring you out on Route 2, just south of your target destination. This route bypasses the long, winding roads that would otherwise force you to trek through heavily guarded checkpoints. Walking through this historic pathway gives you a clear shot toward the northern forest boundaries.
Traversing Route 2 and Viridian Forest
After exiting the cave system, you will find yourself in the northern section of Route 2, which leads straight into Viridian Forest. The forest maze features lush paths filled with classic Bug-type Pokemon and eager trainers looking for a quick battle. Navigating this woodland area requires careful pathing but remains relatively straightforward for high-level Johto champions.
If you prefer a quicker journey, you can simply follow the outer western path of Route 2 if you have the proper field moves unlocked. Whichever path you choose, heading consistently northward will quickly bring you out of the trees and into the open clearings. The rocky terrain of your destination will soon appear on the horizon as you cross the northern boundary.
Exploring Pewter City and Challenging Brock
Upon entering the city limits, you will immediately notice the rugged stone architecture and the massive Pewter Museum of Science. The local Poke Mart offers advanced training supplies that can help you prepare for the incoming tactical gym battle. Speaking to the local citizens reveals interesting lore updates regarding the shifting dynamics of the Kanto region.
The ultimate goal of your visit is to challenge Brock inside the stone-walled gym structure. His team features durable Rock and Ground-type combatants that require powerful Water or Grass-type moves to defeat efficiently. Claiming victory here earns you the Boulder Badge, marking another successful milestone in your ultimate quest to conquer both regions.