starts with side and it is from the 90's

Teenager Riley's mind headquarters is undergoing a sudden demolition to make room for something entirely unexpected: new Emotions! Joy, Sadness, Anger, Fear and Disgust, who’ve long been running a successful operation by all accounts, aren’t sure how to feel when Anxiety shows up. And it looks like she’s not alone.

When 11-year-old Riley moves to a new city, her Emotions team up to help her through the transition. Joy, Fear, Anger, Disgust and Sadness work together, but when Joy and Sadness get lost, they must journey through unfamiliar places to get back home.