How do you get hm surf on Pokemon light platinum?

You can't get HM Surf in Pokemon Light Platinum. It's a fan-made game, and the developers decided to leave out HM Surf and some other HMs. This means you won't be able to use Surf to travel across water in the game.

Instead, you can use the following methods to travel across water:

* Use the "Fly" HM: This will allow you to fly to certain locations on the map, including those across water.

* Take a boat: There are boats available in certain locations in the game that will take you across water.

* Use the "Strength" HM: In some areas, you can push rocks and boulders to clear paths across water.

Remember, these alternatives are specific to Pokemon Light Platinum. In the mainline Pokemon games, HM Surf is a standard move that you can use to travel across water.