Thorax (voiced by Kyle Rideout) is a Changeling in The Times They Are a Changeling. Unlike other Changelings, Thorax is a friendly one who wishes to share love instead of taking it.
- Even though the team was unable to trust Thorax yet, Jeffrey gave him one chance to prove that he can do some good and earn their trust.
- Hiccup, Steven, and Toothless at first didn't trust him, but after hearing his story, they weren't so sure, but after the great progress, they help him out.
- Thorax will first appear in a new episode of Twilight's Adventures Chronicles called "Is a Changeling a Friend or Foe?" and during the seventh season it'll be based of to The Return of Jafar, and The Lion King 2: Simba's Pride which The Rainbooms aren't able to trust him, but after his story, Twilight and Spike are the first ones to trust him.
- SPOILER ALERT: Thorax will return in Jeffrey, Jaden, Hiccup & Juniper Lee's Storm Adventures of My Little Pony: Friendship is Magic - To Where and Back Again, and become the new leader of the Changelings. Thorax will also join Team Berk at the end.
- In the Thunderbolts Adventure Series, Thorax acts as an uncle to Sofia, Ryan, and Baby Skye.
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