Instructions
Head to the southeastern gate in Hearthome City. When you try to leave the city, your rival arrives. Defeat his four-Pokemon team and go through the gate.
Walk south along the road and turn right at the junction. If you want to get the Good Rod, a fishing pole required to catch certain water-type Pokemon, speak to the boy on the far right side of the dock.
Cross over the eastern bridge and walk north across a second bridge. Turn right. If you have an Odd Keystone in your inventory, insert it in the gap in the pile of rubble next to Pokemon Breeder Jennifer. Doing so opens up a new area called the Lost Tower.
Continue to walk north on the path. Fight the Pokemon trainers on the path and, after you beat them, you reach the entrance to Solaceon Town.