How do you get through Power Plant?

Power Plant connects to Route 10 across 2 floors.

Power Plant Pokémon HeartGold: Map, Pokémon, Items & Trainers

The Power Plant map, plus 1 place you can go inside.

Static encounters, gifts and in-game trades.

Trade Dugtrio for Magneton

Every way in and out of this location.

In Pokémon HeartGold, Power Plant is reached from Route 10.

Power Plant leads to 1 other place across 2 floors.

Power Plant is stop 62 of 114 following the connections outward from New Bark Town. It is a route through the map, not the story order.