I doubt a copyright would have helped all that much. You can't copyright the idea of a toy troll in general. There was a prior lawsuit over a toy that was very

I doubt a copyright would have helped all that much. You can't copyright the idea of a toy troll in general. There was a prior lawsuit over a toy that was very similar to Barbie. They resolved it by changing her face to be a bit different: https://en.wikipedia.org/wiki/Sindy https://en.wikipedia.org/wiki/Sindy The trademark does seem to matter, so long as you can convince people they should buy your brand.