The final scene where Napoleon uses a dance routine to win Pedro the school president election. This is further emphasized by the fact that the audience within the movie itself erupts into thunderous applause.
Napoleon's fight with Uncle Rico. After Rico told Deb that Napoleon said she'd look better with breast implants and has been a general prick the entire movie, Napoleon throws a grapefruit at his van (and at Rico himself!), before actually getting out of Rico's grip and fleeing. Also counts as a Funny Moment and Mundane Made Awesome.