Parzival

From Tardis Wiki, the free Doctor Who reference

Parzival of the Vegracandis was a small, alien, dog-like creature which attempted to help the king win the English Civil War, hoping to influence the planet from a position of power. He concealed himself on the back of Prince Rupert’s dog, Boye, and emitted a bark that rendered those around temporarily unable to move or speak by freezing their higher brain activity. The Doctor[which?] used his sonic screwdriver to make Parzival reveal himself and took him away in the TARDIS. (COMIC: Dog of War!)