Kanto Route 3

The only changes along Route 3 between these two Generations are cosmetic, such as the reconstruction of the surrounding landscape. The barriers on either side of the route are removed in the Generation III remakes, while the large patch of tall grass in the center of the route becomes considerably smaller. Also the set of trees have been removed in Generation I and have been replaced by a rocky mountain setting. Other than this, most of the route remains the same.

Many changes were made to Route 3 in Generation II. First, the route was shortened significantly. Also, the number of Trainers along the path was reduced to four. Similarly, the size of the grass patches were reduced by nearly 50%.

Traveling east from Pewter City, the route passes two barriers on either side of the road, and cuts to a clearing that creates a fork in the road, and allows travel north or south, with south curving around eastern and then leading to a dead end. In order to progress, Trainers must turn north after the route opens up and progress east along the northern half. For its western half, Route 3 is a split-level route, so at any point, Trainers can jump the ledges located south of this path, to access a middle section of the route between two ledges, and then again, so Trainer are able to travel west which curves north back to the clearing at the start of the route.

East of the second pair of ledges, the route curves south before returning east near a small patch of tall grass. The size of the tall grass has been reduced by about half. This patch follows the route until the path turns north ahead of a hill. From this point, the route makes a backward "S" curve, turning east past the hilly terrain, south past another ledge taking the route to a large clearing, east again which travels across the clearing, and, finally, to the north, passing the second patch of grass which has also been reduced in size, which has a fence as well as a signpost, which gives out directions.

Part of Route 4 has been combined with Route 3 so now only one route connects Pewter with Mt. Moon, however, the Pokémon Center is no longer there. There are no obstacles along the remainder of the route as it proceeds north towards Mt. Moon.

The meteorites located at the southwest end of Route 3

In Generation IV, the route is different from other generations, with some area changes, as well as major aesthetic features enhanced, including depth and sprite changes. The trees removed in Generation III return, and the east area of the route changes too. Hills, rocks, and breakable rocks are added near Mt. Moon, now part of this route like in Generation II. An additional area at the southwest end of the route allows players to change their Deoxys's current form by interacting with different meteorites. Also, a new hill is placed south of the tall grass.

For its western half, Route 3 is a split-level route. Heading east, Trainers must turn north after the route opens up and progress east along the northern half. The southern half of the route is only accessible by hopping down ledges that will lead Trainers into the paths of more rival Trainers. East of the second pair of ledges, the route curves south before returning east near a large patch of grass containing wild Pokémon. This patch follows the route until the path turns north ahead of a hill. From this point, the route makes a backward "S" curve, turning east, south, east and, finally, to the north, passing the second patch of grass on the route. There are no obstacles along the remainder of the route as it proceeds north towards Mt. Moon. Just before the entrance to the cave, there is a Pokémon Center.

Three unique items have also been scattered around the place, including a Big Root, located near a Firebreather; a Star Piece, located near the meteors; and a Hyper Potion, hidden near the Pokémon Center. The number of Trainers along the path has been increased to eleven. The Pokémon Center at the entrance of Mt. Moon returns but the area around it was reduced significantly in size.

Route 3 first appeared at the end of Showdown in Pewter City. Later, Ash, Misty, and Brock hiked along Route 3 in Clefairy and the Moon Stone. They were on their way to Mt. Moon, when they encountered a man wearing a lab coat being attacked by a flock of Zubat. Ash ordered Pikachu to fire a Thunder Shock at the Zubat, causing them to fly away. The man squeezed Ash and thanked him profusely before introducing himself as Seymour, a scientist.

Route 3 briefly appeared at the end of File 1: Red, where Red traveled through it after defeating Brock at the Pewter Gym.

Route 3 appeared in Gyarados Splashes In!. Red first encountered Misty on this route, fighting a rampaging Gyarados. With the help of Red's Saur, the Gyarados was stopped and eventually caught by Red. Afterwards, Misty told Red that the Gyarados was actually hers, having gone missing some time earlier and returned raging mad.