Getting Lucky (1989)

"Middlevale High has Cheerleaders, Jocks, Nerds... and a Leprechaun!"

School nerd Bill just wants to save the world and to score a date with cheerleader babe Chrissie Schackler. Both become real possibilities when he finds an alcoholic Leprechaun in a beer bottle he was about to recycle. Wacky hijinks ensue as the leprechaun, Lepkey, messes up a few of the wishes. Can Bill fight off school jock Tony Chanuka and marry Chrissie so they can fulfill their dream of opening a clinic?