|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.|
After Jim finds the Killahead Bridge has been moved, he must use a gaggletack (an artifact that looks like a horseshoe) to find who in Arcadia is a changeling. If he touches a changeling with the gaggletack, they change from human form to troll form, so Jim and Toby go around the school touching everyone with the gaggletack to see who is a changeling.
- Jim Lake Jr.
- Tobias Domzalski
- Claire Nunez
- Steve Palchuk