Phrase

Phrases are a feature in Tomodachi Life where a Mii can say a phrase, There are five. The first being A regular catchphrase that you can give when the specific Mii has leveled up. The other four are given randomly when a Mii has a Problem. The four are for emotions, Happy, Sad, Angry, and Worried. Each having 8 animations you can give the Mii with the catchphrase attached. You can also change the catchphrase at any time when the Mii isn't asleep.

How catchphrases work
Phrases can be activited by simply entering a Mii's apartment. They can also be activited via certain oher events, for example an angry phrase is used when a Mii just had a fight, or a sad one when they had a break up or rejection.