Happiness
"Happiness" is an in-game mechanic that indicates how friendly the Pokémon is to the owner, from a scale of 0 to 255.
Effects
A few Pokémon require a certain amount of happiness to evolve. There are currently 15 Pokémon that evolve through happiness. In order to evolve, the Pokémon must have a happiness of 220 or more.
Running Away
If you lower your Pokémon's happiness to 0, the Pokémon will run away to the shelter. You will be sent a message by the SYSTEM. To prevent this from happening, put your Pokémon in a field it likes.
Raising Happiness
Each Pokémon has a type which effects what fields the Pokémon likes. Pokémon like the fields that are super-effective against them, and their own type, while disliking types that are not very effective on them. For example, Cyndaquil, a Fire type, will like the Fire, Ground, Rock, and Water fields. Pokémon do not gain or lose happiness in neutral-effectiveness fields, such as Electric for Cyndaquil. The Typeless field does not increase/decrease happiness either. For double typed Pokémon both types affect the Pokémon's field preference. A Bug/Poison type will be neutral to a bug field.
This feature has not been programmed, but items such as the Cookie will be used to raise happiness.
Soothe Bell
An item bought in the shop, the Soothe Bell, can be used to increase happiness gained from fields. (Multiplier/Formula needed)
Trading can be used to restore a Pokémon with low happiness to 70. However, this can also lower a Pokémon's happiness if it is higher than 70.
Lowering Happiness
Fields
If a Pokémon is put into a field that is not very effective against their type, they will lose happiness. For example, Umbreon, a Dark type, will dislike the Psychic and Ghost fields. Since Umbreon completely resists the Psychic type, its happiness will decrease faster in a Psychic field than in a Ghost field. If you are unsure of what your Pokémon will dislike, look up a type chart.
Certain Gigaremos will lower a Pokémon's happiness every time a specified action is performed.
Checking Happiness
You can check a Pokémon's happiness in its summary, or when you scroll over it in private field view.
