Pretending to be Spike's reflection

Here's Thorax as his original self.

Unexpectedly saving Spike from falling

Aww

Baby Thorax is scared of Queen Chrysalis

A reluctant Thorax at the Canterlot Wedding attack

"I'm starving!"

Socializing with the Crystal Ponies

"I can't keep pretending to be a crystal pony forever"

"Leave me alone!"

"Why do you think I would help you?"

"I'm an "evil changeling"!"