The Breakfast Club

The storyline follows five teenagers (each a member of a different high school clique) as they spend a Saturday in detention together and come to realize that they are all deeper than their respective stereotypes.

Youth is represented negatively at first as they stereotype and bully each other and they're in detention. They also disobey the teacher and do drugs etc but as the film goes on they're presented more positively in other ways. For example, they all become friends with each other despite their stereotypical cliques and friends and they also accept each other and listen to their individual problems and help each other out.

The Goonies

The Goonies is a 1985 American adventure–comedy film about a group of boys who live in the "Goon Docks" neighborhood and are attempting to save their homes from demolition, and in doing so, discover an old Spanish map that leads them on an adventure to unearth the long-lost fortune of One-Eyed Willie, a legendary 17th-century pirate.

Youth is represented quite positively in The Goonies as it portrays them as adventurous and ambitious. Their friendship also portrays youth in a positive way as they're loyal and care about each other. 
Youth is also presented negatively as they disobey their parents etc and break into a house but they had good intentions so it doesn't count.