Sanity Levels in The Sims 2 (Nintendo DS): No Sanity Meter—Mood Meter Has 5 Levels

No "sanity" meter exists. The game uses a Mood Meter (top-left) with 5 levels:

1. Very Happy – Green; optimal performance.
2. Happy – Light green; minor needs.
3. Neutral – Yellow; bored/tired.
4. Sad – Orange; poor performance, negative interactions.
5. Very Sad – Red; severe moodlets, very difficult.

Raise Mood by fulfilling needs: Hygiene, Hunger, Energy, Fun, Social.