Pokemon HeartGold SoulSilver Kanto Walkthrough Part 21 – Route 18
Again, a relatively short route, but there are still somethings to do here. Just as you exit Route 17, you will see a final Biker waiting to challenge you. This is Charles who has a Koffing lvl. 41, Charmeleon lvl. 41 and Weezing lvl. 42.
Head to the East after this. You will pass through a second Guard Post, signaling the official end of the Cycling Road. Before you continue straight into Fuschia City, take a moment to turn down and hit the small grass patch. There are some nice Pokemon in there as well as a few trainers. The one closest to the entrance is Bird Keeper Bob who has a Noctowl lvl. 48. The second trainer who is closer to the water is Bird Keeper Boris. He has three Pokemon, a pair of Doduos, one at lvl. 39, one lvl. 27 and a Dodrio lvl. 41.
After you beat these trainers, you will be done with Route 18. Head to the right on the main part of the Route to reach Fuschia.