|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.|
Fetches are artifacts that act as little portals to the Darklands. Unlike a real portal, the Fetches are too small to allow beings to pass thro]ugh them but are large enough to allow small things like stones, goblins, gnomes and babies to pass through. The Gumm-Gumms use them to send Changelings to supplant human babies so that they can spy on the human realm.
Nomura managed to acquire a Fetch and received it at the museum. Later, she used it as leverage to get Bular to spare her after letting Jim and Toby see Killahead Bridge, promising new Changelings to bolster his father's army. The Fetch later deposited a message from the Darklands, informing Stricklander and Bular that Enrique has been chosen as Changeling's familiar. Thus, a goblin abducted the infant from his home and swapped him through the Fetch with his Changeling doppelganger.
The Fetch was later moved to Stricklander's hidden vault in his office at Arcadia Oaks High. This fell into the hands of the Trollhunters when Toby, Blinky and AAARRRGGHH!!! raided his office. At NotEnrique's suggestion, Toby poked his head through the Fetch in the hopes of seeing Enrique, only to attract the attention of a glowing ball of fire that advanced on Toby. The Fetch portal began to move as back in Arcadia, the trolls had to carry Toby as they fled an Antamonstrum, managing to take it off his head and out of the Darklands before he hit a rock. They eventually use the Fetch to banish the Antamonstrum to the Darklands.
The Trollhunters relocate the Fetch to Toby's house, where Jim bemoaned his inability to use the Fetch to rescue Enrique. He first suggested using the Furgolator to shrink himself to a manageable size to enter the Fetch, but Toby reminds that the shrinking effect is temporary and Blinky adds that the Darklands are a black labyrinth that would make finding Enrique impossible before his time is up. Ultimately, Gnome Chompsky was sent through the Fetch, but the team immediately lose him as his lifeline was torn.
Toby later uses the Fetch to find Jim in the Darklands and send him Nougat Nummys as a rescue message.
Prior to the final battle against Gunmar and Morgana, NotEnrique and Chompsky use the Fetch to enter the Darklands to rescue the Changeling familiars using a Cradle Crystal provided by Merlin and managed to return to Arcadia before the Darklands collapsed.