Lavender Town is still a small town, but it has been modernized somewhat by the conversion of the Pokémon Tower into the region's new Radio Tower.
Kanto Radio Tower
The tower security has been on alert ever since Johto's Radio Tower was taken over by Team Rocket, so visitors are restricted to the first floor. The Pokégear can already detect two of the three programs broadcasted here, but accessing the Poké Flute Channel requires an EXPN Card.
The Soul House was built to accommodate the departed Pokémon from the former Pokémon Tower. There are several graves on the ground floor, and many more located in underground chambers that are off-limits to all but the caretaker, Mr. Fuji.
The Name Rater lives in the southeast house, and allows Trainers to rename any of their Pokémon. However, he cannot rename a Pokémon obtained in a trade.
Walk straight ahead onto the platform to find TM47 (Steel Wing), then go west to reach an Elixer. Head east and take the ladder to the basement.
Head south to find a hidden Max Potion, then southeast to get a PP Up. Grab the Revive to the northeast, then climb the ladder to the east.
Walk northwest to reach the next ladder.
Follow the path southward to reach a T-intersection. Go west to reach an Iron, then climb the ladder in the southeast corner.
Check the dead-end path for a hidden X Accuracy, and follow the path to the exit.
Outside the tunnel's northern exit is a conveniently-placed Pokémon Center. Chat up the patrons inside to learn that the Kanto Power Plant's manager is looking for a strong Trainer to recover a stolen piece of equipment. Head up north to the canal, then swim southward to reach the building.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
The Power Plant
The old, abandoned Kanto Power Plant was recently renovated in order to power the region more efficiently. However, a thief has stolen an essential part of the new generator, forcing it offline. As you turn to leave, the security guard is alerted to a shady character that has been seen loitering around Cerulean City, and he asks you to check it out. Sail back northward and head west to reach the city.