How do you capture ralts Pokemon light platinum?

You can't capture Ralts in Pokémon Light Platinum. Ralts is not a Pokémon that appears in that game.

Light Platinum is a fan-made game and does not have all the Pokémon that are in official games.

If you are looking to catch Ralts, you might want to try another game in the Pokémon series, such as:

* Pokémon Ruby, Sapphire, or Emerald: Ralts can be found in the Ever Grande City, specifically in the grass patches near the Pokémon Center.

* Pokémon Omega Ruby or Alpha Sapphire: Ralts can be found in the Ever Grande City, specifically in the grass patches near the Pokémon Center.

* Pokémon Diamond, Pearl, or Platinum: Ralts can be found in the Eterna Forest.

* Pokémon Black, White, Black 2, or White 2: Ralts can be found in the Nacrene City.

* Pokémon X or Y: Ralts can be found in the Lumiose City.

* Pokémon Sun or Moon: Ralts can be found in the Poni Grove.

Please let me know if you have any other questions about Pokémon Light Platinum or other Pokémon games. 😊