In pre Celtic Ireland the Leprechaun had a angry drunk cousin called the Clurichaun, that's who's in that movie!

Leprechauns usually take the form of old men who enjoy partaking in mischief. Their trade is that of a cobbler or shoemaker for fairy folk. They are said to be very rich, having buried treasure hidden everywhere.

Some folklorists describe the Clurichaun as a "night form" of the leprechaun, who goes out and becomes a surly drunk after finishing his daily chores.