Okay, first off - don't ask me how or why the leprechaun is in space. Don't ask me how he has managed to come back in any of these movies thus far after being destroyed in the previous one because the only explanation they come up with to answer that is that he is "eternal." I guess after he gets blown up at the end of these movies, he just, like... re-materializes somewhere else? Sure, let's go with that. Anyway, he's in space now. He still cares about his gold, but now it seems like he wants a little power, too, because he wants to be king of some ridiculous made-up planet. He's not into this marriage for love, that's for sure.
It all ends (sorry for all the spoilers, but that's kind of what I do) with the giant leprechaun getting sucked out into space and exploding again and then the giant leprechaun's hand flips off our remaining survivors through the space ship window. Leprechaun 4: In Space is crazy, silly, and weird, and I really wouldn't have it any other way. Can't wait to go into da hood with the next two movies!