Troll 2 isn't as entertaining as it's predecessor but is still funny. In this one a family takes part in a houseswap with a family from a town called Nilbog. But the other family is a bit weird.
There's the ghost of a grandfather who keeps popping up to tell the young boy in the family what to do. There's a terrible goth vampiress character who is looking to abduct some teenage kids and turn them into trees and there's an ending that is all over the place.
It's still really fun to watch but Troll 1 was the better of the two IMO.