Trollkins are a toyline by The Original San Francisco Toymakers. They were trademarked in 1998 by the company.
They are regarded as a counterfeit Troll Dolls toyline. It has no association with the older animation of the same name and is a completely independent product.
About[]
A picture of 3 of the dolls, image from e-bay seller
These dolls look exactly like the official Good Luck Trolls almost and have little variation on the original design. They come in boxes designed to look like houses, with the idea that to gain access to the doll you cut out the door on the packages back. This allows access to the doll, and then the package to remain acting as the Trollkins "house". The idea is to collect as many of the dolls as possible and to build up a town using the dolls. Each "house" had a number on the back signaling where in the Townkin town "street" each Trollkin's home was placed.