How do you use the heart scale in Pokemon pearl?

1. Turn on the Pokétch app. The Pokétch app is a device that can be accessed from the main menu of the game. It contains a variety of tools, including the Heart Scale.

2. Select the Heart Scale. Once the Pokétch app is open, select the Heart Scale icon. This will open the heart scale menu.

3. Select the Pokémon you want to check. In the heart scale menu, you will see a list of your Pokémon. Select the Pokémon you want to check.

4. View the Pokémon's affection level. The Pokémon's affection level will be displayed on the screen. The affection level is a measure of how much the Pokémon likes you. It can range from 0 (no affection) to 255 (maximum affection).

5. Increase the Pokémon's affection level. There are several ways to increase the Pokémon's affection level. Some ways include:

* Giving the Pokémon items it likes.

* Feeding the Pokémon Poffins.

* Grooming the Pokémon.

* Playing with the Pokémon.

* Walking with the Pokémon.

6. Use the Heart Scale to evolve certain Pokémon. Some Pokémon, such as Eevee, can only be evolved using the Heart Scale. To evolve a Pokémon using the Heart Scale, the Pokémon must have a high enough affection level and the Heart Scale must be in your inventory. When you level up the Pokémon with a high enough affection level, it will evolve into a specific form depending on its Nature.