The titular Buddy Love from "Buddy Love Goes Coconuts" is named after the alter ego of Julius Kelp and Sherman Klump from 1963 film The Nutty Professor and its 1996 remake respectively.
When Arnold and Gerald are in the House of Costumes, Gerald comments about being a "free man in Paris, unfettered and alive," and that he heard it on a hippie record. That album is Joni Mitchell's 1974 album Court and Spark. The song he’s quoting is Free Man in Paris.
When Arnold and Gerald are in the police station, there's a wanted poster showing someone resembling Sideshow Bob from The Simpsons, another reference to the fact that Craig Bartlett and Matt Groening are brothers-in-law.
Stay in school unless you are sick or you have a reason to miss school like a doctor's appointment, a death in your family or an important family activity. And if you feel stressed or not up for school, then seek professional advice from a mental health expert or an expert from related professions.