My Little Pony: Friendship is Magic - Don't Underestimate the Fighting Techniques of Wai Fu!

Check the last comic. They got in here through a tiny door which Discord put on Chrysalis' forehead. And then he put on a green sweater, a bomber jacket, an aviator's hat and red goggles.

Also, it's spelled PsychoNAUTS. Like Astronauts, but psychic.