Since only Rydia's Mist Dragon can kill the Shadow Dragon, its statistics are unknown in the Bestiary.
"Come forth, my creature of shadow!"
—Golbez summoning the Shadow Dragon
The Shadow Dragon is an enemy in Final Fantasy IV that is summoned by Golbez. After locating the underworld Crystals in the Dwarven Castle, and defeating the Calcabrina, Cecil and his party are interrupted by Golbez and forced to battle him. Golbez immediately paralyzes the party and calls forth the Shadow Dragon. All members of the party are defeated by the Shadow Dragon's Black Fang attack, except for Cecil. Rydia shows up, now an adult, and summons the Mist Dragon. Rydia's Eidolon defeats the Shadow Dragon, and Cecil and his friends can deal with Golbez. Golbez still manages to escape with the Dwarves' Crystal.
Found in the Xarcabard area, Shadow Dragon appears as a (technically) normal monster, although only one exists at any given time and takes longer to reappear than other monsters. It is a "placeholder" for a more powerful dragon, Biast, which has a chance to appear after the Shadow Dragon is defeated.
Dissidia Final Fantasy/Dissidia 012 Final FantasyEdit
"Creature of shadow!"
When entering his EX Mode, Golbez summons and fuses with the Shadow Dragon; its face can been seen on the left shoulder pad of Golbez and its tail can been seen on his right shoulder. It can use its signature Black Fang attack, and it performs Binding Cold as part of his EX Burst. However, in Dissidia 012, Golbez gains a new attire where the Shadow Dragon does not appear when Golbez goes into EX Mode. Black Fang and Binding Cold can still be executed as though the Shadow Dragon is present.