Midnight

Twilight is a mysterious army in Digimon Xros Wars.

SkullKnightmon
SkullKnightmon is an unscrupulous Digimon who serves as the brains behind Twilight.

When Shoutmon X4 and MetalGreymon appear to have DarkKnightmon on the ropes, he orders Nene to use Xros Open to split him back into SkullKnightmon and DeadlyAxemon, allowing him to attack each of them one-on-one. After regaining the advantage, he has Nene DigiXros him and DeadlyAxemon together to SkullKnightmon Bigaxe Mode.

Attacks
 * Spear Needle
 * Breast-eye Wink

DeadlyAxemon
DeadlyAxemon is SkullKnightmon's sworn brother, an incredibly strong Digimon that can DigiXros with SkullKnightmon to create a multitude of powerful forms.

Attacks
 * Air Slicer: Runs between the opponents at the speed of light, who aren't even able to realize it before they're cut down.
 * Aqua Rage: Spews a powerful solution that dissolves everything.
 * Aqua Regia: Liquefies himself using Aqua Rage and swallows up all of his surroundings.

SkullGreymon
SkullGreymon is one of DarkKnightmon's minions. He attacks Xros Heart in the Dust Zone alongside DarkKnightmon and SkullSatamon, and is later absorbed by DarkKnightmon using the Darkness Loader.

SkullSatamon
SkullSatamon is one of DarkKnightmon's minions. He attacks Xros Heart in the Dust Zone alongside DarkKnightmon and SkullGreymon, and is later absorbed by DarkKnightmon using the Darkness Loader.

Guardromon
An army of Guardromon serve DarkKnightmon in the Dust Zone, but are deleted by the combined efforts of MetalGreymon, Cyberdramon, Deckerdramon, and Shoutmon X5.

Attacks
 * Destruction Grenade

Peckmon
In the Digimon Xros Wars manga, a Peckmon helps dress Nene in the Sweets Zone.

SkullKnightmon Bigaxe Mode
SkullKnightmon has Nene DigiXros him and DeadlyAxemon into this form, after regaining the advantage in the battle against Shoutmon X4 and MetalGreymon.

DarkKnightmon
DarkKnightmon is a DigiXros of SkullKnightmon and DeadlyAxemon, who have exchanged cups of brotherhood. Although his skills, including the ability to use the "Twin Spear" he wields to thrust, slash, sweep, or throw as the situation calls for, are very advanced, he will use any means to achieve his goals, and sometimes he will even be willing to betray his own comrades. He is an opponent that you don't want to turn into an enemy, if you can help it.

Attacks
 * Twin Spear
 * Shoulder Blade
 * Undead Soldier

SuperDarkKnightmon
SuperDarkKnightmon is a DigiXros of DarkKnightmon, SkullGreymon, and SkullSatamon. By igniting the Darkness Loader, DarkKnightmon absorbs SkullGreymon and SkullSatamon to achieve this new form. Before he leaves the Zone, he summons a giant cloud of darkness to attack the other armies, and states that he will become the strongest Digimon of all time.