Criminal Nathan Dolly,a doll collector, received two wooden dolls from Wundagore Mountain, where the evil entity Chthon is imprisoned. Dolly learned how to project his life force into and animate the dolls, referring to them as the Brothers Grimm.

But Dolly made the mistake of projecting himself into both dolls at once and his consciousness was trapped in them permanently. When he coerced the sorcerer Magnus into helping him escape from the dolls to possess a human body. Magnus destroyed him.

Later two businessmen named Percy and Barton Grimms, acquired Dollys theater and full-size manikins of the Brothers Grimm.

Trying on their clothes, the brothers found they had the powers of the original Brothers Grimm. They used their powers to exact vengeance on a rival who cheated them,but they where stopped by Iron Man 2. After leaving prison they joined the Night Shift.

There whereabouts at this time is unknown....

Alternate Realities

On Earth-9997 the Brothers Grimm refers to Thing's two boys, Buzz and Chuck. They are basically smaller versions of Thing.