These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The scene in the movie theater where Porco watches the cartoon that depicts an evil, overweight pig (meant to evoke Bluto from the Popeye cartoons) kidnapping a Minnie Mouse lookalike and then the evil pig is beaten down and then knocked into the sky by a heroic Mickey Mouse lookalike becomes an incredibly painful Tear Jerker when you realize that the cartoon is a symbolic reflection of how Porco sees himself - as a vile, despicable fiend who doesn't deserve any happiness.