Dirty Deeds Done Dirt Cheap

"Allowing neighboring worlds to exist simultaneously in the same location. That is my Stand ability, "Dirty Deeds Done Dirt Cheap"."

- President Funny Valentine,

Dirty Deeds Done Dirt Cheap (Dirty deeds done dirt cheap “いともたやすく行われるえげつない行為”), frequently shortened to D4C, is the Stand of Funny Valentine, featured in the seventh part of JoJo's Bizarre Adventure, Steel Ball Run.

D4C is a humanoid Stand that allows its user to pass into parallel worlds at will and pull people from them back into his world. With the exception of Funny Valentine himself, if a person comes into contact with themselves from an alternative world, both of them will be destroyed.

Appearance
D4C has a humanoid form with large, upright horns that somewhat resemble the ears of a ; a masked mandible, and a light body lined by an almost unbroken seam or trim. It's designed after the image of leather being stitched together, like on a baseball. Under its brow, its eyes appear to emote a cold gaze.

After a late encounter with Gyro Zeppeli, along with Valentine, D4C's appearance changes drastically as a result of Valentine's rapid aging at the hands of Gyro's Stand, losing a layer of its face, including its horns. Even after Valentine recovers his health, D4C keeps its new form.

Abilities
D4C is among the most powerful Stands in the series. In its default form, it is a close-range Stand with above-average strength and speed. It is able to punch a grown man away violently and rivals a transformed Diego in speed.

Although still exploring its full potential, Valentine is adept and creative with its powers.

Travel Between Parallel Worlds


In the reality of Steel Ball Run, an uncountable number of parallel worlds are assumed, each following the same basic chain of events. However, the Saint's Corpse exists in only one of these worlds, which is referred to as the "base world" (基本世界). Though these parallel worlds would normally never cross paths with the base world, Dirty Deeds Done Dirt Cheap allows them to overlap and co-exist in the same place and/or time. It also allows its user, and anyone or anything its user desires, to travel between these parallel worlds, preserving the force of their internal gravity to prevent them from being annihilated.

In order to travel between parallel worlds, Valentine or his intended target must be put between two objects in close proximity of each other. These objects can be any matter other than air, including liquids such as water and gases such as dust and steam. Only an infinitesimal part of the traveler must be put between two objects to allow the ability to activate. Valentine can also choose to only partially transport people or things between worlds, immobilizing them inside one of the surrounding objects. After being transported, the traveler can emerge from anywhere nearby, including from someone else's back. Valentine can also use this ability to avoid taking damage from projectiles by using it to partially transport himself between worlds.

Properties of Parallel Worlds
A notable natural law of parallel worlds is that only one iteration of any person or thing can exist in the same universe at the same time. Thus, if Valentine pulls someone or something else into a parallel world, they will begin to slowly be pulled toward their iteration in that universe. Once two iterations of the same person or thing enter close proximity, portions of each in the form of will fly toward and collide with their alternate iterations, being completely annihilated without a trace; when the duplicate people or things themselves collide, they merge as well and are eradicated completely, potentially damaging those in the immediate radius of the collision. The only way for victims of D4C's ability to avoid destruction is by returning the transported iteration of themselves to their original world, which can be accomplished simply by putting them between two objects once more.

As a side effect of D4C's ability, Valentine is the sole exception to the above rule, and may safely co-exist and interact with as many iterations of himself as he pleases. This allows him to summon several iterations of himself in the same world to outnumber his opponents, conspire with his alternate selves, and even fake his own death by leaving corpses of his parallel selves in other worlds. Though these Valentines may possess similar Stands in appearance and strength, D4C's ability is wholly exclusive to its iteration from the base world. In order to preserve this unique ability, if Funny Valentine is gravely injured, he is able to transfer ownership of it to another iteration of himself in the same world. The receiving Valentine retains their own consciousness, but acquires both full use of D4C and the memory of its prior user.

Two iterations of the same object or person may also co-exist safely if they are from the same timeline. Therefore, the two Joseph Joestars (one from Part 2 and the other from Part 3) featured in Eyes of Heaven can safely interact with each other.

Overlapping of Parallel Worlds
In its first proper demonstration, the range of D4C's power could be expanded beyond the two objects necessary for transport between worlds, as Valentine was able to overlap two separate parallel worlds with the base world. As a consequence of the ability's larger range, those unaffected by the Stand's ability were able to see into different overlapping parallel worlds depending on their viewing angle.

Creation and Development
Araki states that the rabbit-like design of D4C's head came about because he wanted the Stand's silhouette to be completely different from the Stands of the previous main antagonists, so he decided to give it long ears.

Dirty Deeds Done Dirt Cheap also appears in the novel, although it belongs to an incarnation of Funny Valentine from the first universe as well as the grandson of Funny Valentine from the 37th universe, The Funniest Valentine. Like the original D4C, the Stand can be lent by the user to a parallel world version of himself. However, a unique attribute of D4C in the novel is that if the Stand is being lent then it automatically returns to its original owner if the current owner is killed.

As there can only be one Stand per person, the different versions of Funny Valentine in each parallel world he accesses does not have a Stand, but there are several versions of The Funniest Valentine in Funny's parallel worlds who have D4C. It is the opposite for The Funniest's parallel worlds. Thus, Funny can collect several versions of The Funniest with D4C from his parallel worlds, whereas The Funniest can collect multiple versions of Funny with D4C instead. However, these different versions with their own Stand can be destroyed by the rule if they touch each other.

Later, Kars gets his own enhanced copy of the Stand, known as Ultimate D4C.

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Trivia

 * In the English localization of, D4C is only referred to by the shorthand D4C, whilst the full phrase "Dirty Deeds Done Dirt Cheap" is generally changed to a synonym phrase ("Time to perform some dishonest acts at a fair and reasonable price!"). The JoJo Glossary seemingly mocks this change by claiming that "No one knows what this mysterious abbreviation means".