Continuity mistake: During the scenes in the kitchen near the end, such as when Tori answers the phone to the Leprechaun, the magnets on fridge move, appear, disappear etc. (01:04:05)
Continuity mistake: When Nathan shoots the leprechaun after he entered out through the chimney, the leprechaun lies in different positions between shots. (01:05:30)
Continuity mistake: After Nathan pours the gasoline and throws the match in the well, we see a canister and shotgun sitting by well. But when the well explodes, they've disappeared. (01:23:50)
Continuity mistake: Officer Tripet gets tired of running and he slumps down against a tree. His places his left arm up on the trunk and it slides down so that now his hand is down atop his knee. The shot changes to his front and now the hand and arm are back up on the tree trunk above his shoulder.
Continuity mistake: When the man opens the locker, the leprechaun jumps out and kills him by pogo-sticking him to death. He never pogo's on anything but the man's chest, yet the victim has big bloody welps all over his face.
Continuity mistake: At the beginning of the movie when Danny grabs the gun to shoot the Leprechaun, he fires only two shots and has to reload but when he opens the gun chamber to reload, you can see that there are no used shells in the chamber.
Continuity mistake: The paint marks on Nathan's right arm change shape.
Continuity mistake: When Tori and Nathan are first in the diner, it is dark outside. When Alex and Ozzie join them in the next diner shot, it is still daylight outside.