This article contains canon information corresponding to the Tales of Arcadia franchise. That means all information in this article is true and has appeared/been validated officialy on-screen.
Gnome Your Enemy is the fourth episode of season one of Trollhunters.
Jim undertakes his first Trollhunting mission by starting small—literally. He must shrink down to eight inches tall to apprehend a mischievous gnome. When he captures the gnome, he must get rid of him, but wakes up the next day to find himself still in a shrunken state. With his Spanish project due soon, Jim must find a way to finish and present it without revealing his double life.
According to Blinky, the trolls had come over to Arcadia on the Mayflower and then snuck off the ship and found the then-unnamed Arcadia.