How do you find a sun stone in Pokemon liquid crystal?

You can't find a Sun Stone in Pokemon Crystal (or any other Pokemon game for that matter). Sun Stones are a type of evolution item that are specific to later generations of Pokemon games, introduced in Generation III.

Here's why you won't find a Sun Stone in Pokemon Crystal:

* Game Mechanics: Pokemon Crystal uses the mechanics of Generation II, where Sun Stones don't exist as an evolution item.

* Evolution Method: Pokemon that evolve using Sun Stones in later generations (like Sunkern and Gloom) evolve using different methods in Pokemon Crystal. For example, Sunkern doesn't evolve in Pokemon Crystal.

* No Availability: There are no known glitches or hidden items in Pokemon Crystal that could give you a Sun Stone.

If you're looking to evolve Pokemon that require a Sun Stone, you'll need to play a game from Generation III or later.