How do you get Porygon in soul silver?

You can't get Porygon in SoulSilver directly. Porygon is a Pokémon that evolves from Porygon2, which you can obtain by trading a Porygon from another game. Here's how to do it:

1. Obtain Porygon: You need to trade a Porygon from another game like Pokémon Red, Blue, Yellow, Gold, or Silver.

2. Trade Porygon to SoulSilver: Once you have a Porygon, trade it over to your SoulSilver game.

3. Level up Porygon to level 71: This will make it evolve into Porygon2.

Alternatively, you can obtain a Porygon2 via the following methods:

* Trade with a friend who already has a Porygon2: Ask a friend to trade their Porygon2 to you.

* Obtain it through Wonder Trade: If you're lucky, you might encounter a Porygon2 via the Wonder Trade feature.

Remember: You can only obtain Porygon2 through trade or by evolving a Porygon. You can't find it in the wild or through any events in SoulSilver.