Where can you see a Clefable in Pokemon Platinum?

You can't find a Clefable in the wild in Pokémon Platinum. Clefable is the evolved form of Clefairy, and while you can find Clefairy in the wild, Clefairy does not evolve in Pokémon Platinum.

Here's how you can get a Clefable in Pokémon Platinum:

* Trade: The most common way to get a Clefable is to trade with someone who already has one. You can trade with other players online or through the local wireless connection.

* Transfer from previous games: If you have a Clefairy or a Clefable from a previous generation game (like Diamond, Pearl, or even older games), you can transfer it to Pokémon Platinum using the Pal Park.

Unfortunately, evolving Clefairy into Clefable in Pokémon Platinum is not possible within the game's mechanics.