Like the original, the prequel stresses the importance of friendship, perseverance, and teamwork. The relationship between Sulley and Mike proves that once you get past superficial differences, others might have more in common with you than you first thought. Empathy is a major theme. The story also teaches that you shouldn't let others dictate whether you're good at something or not. If you're willing to work hard and team up with other people, you can accomplish almost anything.
Positive Role Models & Representations
Mild insults, mostly toward Mike Wazowski -- i.e. "jerk," "lame," "failure," "you don't belong here," etc.
While there are no product placements in the movie, as part of the Disney empire, the Pixar movies have a ton of advertising, licensed merchandise, and products available, including stuffed plushes, board/video games, apparel, accessories, and more.
Ease of Play
Some mild college partying scenes, in which characters are seen holding red party cups (the contents of which aren't commented on) and playing a version of a well-known drinking game.