Feral alien climbs down your chimney on Christmas Eve.

You're snowed in tonight, snug as can be in your bed while you wait for your white Christmas, when all the sudden there's an intensely curious runaway alien climbing down your chimney for warmth. He steals the fruitcake that you left for Santa, humps your throw blanket, and knocks all the ornaments off your tree, turning your living room floor into a minefield of broken glass bulbs.

This guy is an unholy terror of a gremlin, but highly tamable. Probably.
Definitely peggable.