Reaction

Emotions are used by both players and villagers in and, but only villagers in the earlier games.

Villagers' Emotions
Aside from expressing emotions when in conversation, villagers may also show an emotion when walking about town-
 * If a dark cloud with a puple swirl appears above a neighbor's head then that means they're sad.
 * When an ! is above a villagers head then that means they're surprised or want to talk to you.
 * When steam comes out of their head, they're angry.
 * When they're singing, that means the villager is happy.
 * Villagers may also clap when a Player catches a rare fish or insect, or sometimes when fireworks go off in City Folk.

Conversations with CPU villagers and players sometime cause a villager's emotion to change from normal to happy, sad, or angry. You can't start a conversation with villagers when they are angry or sad - they will tell you they don't feel like talking.

Learning Emotions
In Wild World, the player can get emotions from Dr. Shrunk in a random encounter with him when he is walking around your village.

In City Folk, Dr. Shrunk is found in the city's theater, where you can learn emotions for 800 bells. He is sometimes replaced by Frillard, who teaches emotions unknown to Dr. Shrunk. You can store up to four emotions.

Emotions
Here is the list of emotions to learn and what they look like in-game.