How do you beat team rocket a lake of rage Pokemon heart gold?

Answer 1

First, go to the Lake of Rage and talk to the orange-haired fellow standing next to the "Lake of Rage" sign. This is Lance, and he will guide you through the mission.

Then go into the shop with the two suspicious looking characters (next to the tree with the antenna). Lance will open up the secret passage, and you will be in the secret base.

From there, simply progress through the base by defeating all of the team Rocket Members and you will eventually reach the final battle where you and Lance will fight side by side. After winning this, you will have defeated Team Rocket.