503.3.

The copy's copiable values become the copied information, as modified by the copy's status. Objects that copy the object will use the new copiable values.

Example: Vesuvan Doppelganger reads, "As Vesuvan Doppelganger comes into play, you may choose a creature in play. If you do, Vesuvan Doppelganger comes into play as a copy of that creature except for its color and gains 'At the beginning of your upkeep, you may have this creature become a copy of target creature except for its color. If you do, this creature gains this ability.'" A Vesuvan Doppelganger comes into play as a copy of Grizzly Bears (a 2/2 green creature with no abilities). Then a Clone comes into play as a copy of the Doppelganger. The Clone is a 2/2 blue Bear named Grizzly Bears that has the Doppelganger's upkeep-triggered ability.

Example: Tomoya the Revealer (a flipped flip card) becomes a copy of Nezumi Shortfang (an unflipped flip card). Tomoya's characteristics become the characteristics of Stabwhisker the Odious, which is the flipped version of Nezumi Shortfang.

Example: A face-down Grinning Demon (a creature with morph) becomes a copy of a face-up Branchsnap Lorian (a 4/1 green creature with trample and morph {G}). The Demon's characteristics become the characteristics of Branchsnap Lorian. However, since the creature is face down, it remains a 2/2 colorless creature with no name, types, or abilities, and a mana cost of {0}. It can be turned face up for {G}. If it's turned face up, it will have the characteristics of Branchsnap Lorian.

Example: A face-down Grinning Demon (a creature with morph) becomes a copy of Wandering Ones (a 1/1 blue Spirit creature that doesn't have morph). It will be a face-down Wandering Ones. It remains a 2/2 colorless creature with no name, types, or abilities, and a mana cost of {0}. Its controller can't turn it face up as a special action. If an effect turns it face up, it will have the characteristics of Wandering Ones.