How do you get a silver wing in Pokemon heartgold?

You can't actually get a "silver wing" in Pokémon HeartGold. That's a physical item from the real world, not something within the game.

It sounds like you might be thinking of Silver Wing, a held item in the game that boosts the power of Flying-type moves! Here's how to get it:

1. Find it in the wild: It can be found as a rare item held by Pidgey, Spearow, Fearow, and Starly. You'll have to be lucky and catch one that has it.

2. Trade for it: Another player may have a Silver Wing they're willing to trade.

3. Buy it from a shop: While the game doesn't have shops that sell this item, you might find it at certain online marketplaces where people sell Pokémon items.

Let me know if you have any other questions about Pokémon HeartGold!