Junkpile is a fictional character in Marvel Comics's 2099 universe, a look at superheroes in the year 2099. He was one of the main antagonists of a future incarnation of the X-Men called X-Men 2099, and briefly was affiliated with both the X-Men and SHIELD.
Later, when Skullfire and La Lunatica set out on their own, Luna contacted Junkpile to help her stay safe from the hunters that the Theatre of Pain had set out to retrieve her. Skullfire had great difficulty with this partnership, as he still harbored feelings of resentment against the villain for killing Serpentina. The trio soon stumbled upon the lair of the Driver, a mysterious mutant smuggler from the old days, along with Xi'an. The Driver intended to transmute the DNA of the group into a data stream so that they could be preserved until a utopian golden age came, starting with Junkpile. The group was saved by the malevolent intervention of Brimstone Love, the leader of the Theatre of Pain. After being freed, Junkpile charged after the Driver, who commanded his car to ram Junkpile. The car has the ability to phase through solid objects, and upon phasing through Junkpile, caused a seizure in him. Junkpile started telekinetically pulling all pieces of machinery, including the Driver's computer, towards him, destroying the data of all the mutants that the Driver had stored. Xi'an used his healing powers to restore Junkpile, but only so that he would owe him a favor in the future.
His disassembled body was found months later by President Doom and Morphine Somers, who wanted to use the mutant as a weapon against the X-Men. They put him back together and offered him a membership to SHIELD, giving him complete autonomy to do his bidding. Junkpile jumped at this chance and formed a squad called the Junkyard Dogs to attack the X-Men. Instead of going after his enemies, he found his way to Death Valley, where, trapped with Skullfire, actually teamed up with his hated enemy in order to escape the machinations of the Theatre of Pain.