Dr. Thaddeus Black son of Dr. Holimay Blakk. This derranged scientist is the only reason four individuals exist. He made a cloning machine of sorts that failed on the first two. The other two don't matter for now. The only two that matter are Pure and Doom. Doom Stone a twenty six year old earth pony. He was created first according to the record of the destroyed lab. The Lab he was made in was blown up when the radiation that built up in Doom's capsole was released. It killed everyone except Dr.
Blakk's body was never found to this day. He has a blood red coat a black mane and yellow eyes. Currently he is the age of six being raised by an orphanage. Of cource he didn't like it there so he ran away at the age of seven. He joined elementary school after leaving and instantly became the star of the class. He was a huge nerd and never got into trouble and never got anything less than an A+ on his report cards.
At the age of fifteen something changed. He turned on people that he knew since grade two. These people included Vinyl Scratch, Octavia Melody, Twilight Sparkle, Applejack, Pinkie Pie, and Princess Celestia. His vocabulary became more foul and his eyes randomly flashed blood red. One day he slashed Vinyl and followed her to Octavia's house where she was staying for a bit. When Vinyl and Octavia arrived he was waiting and attacked again. Vinyl and Octavia had no other choice but to run for it. A girl named Serena in his class who was known for going to jail quickly became his friend. He had betrayed almost everyone by that point. When the students got to school the day after the slashing they found their school vandalized by none other than Doom who was waiting. His eyes continued to flash red and he almost killed Serena when half of him turned back to normal.
He used the throwing knife to stab himself in the center of his chest. He was found alive back in his birth place, Cloudsdale. Serena had found him. His eye colour was now permanantly red. He then set off an explosion that created the bad part of Cloudsdale. He wasn't seen after.
Little did he know that he had a younger brother named Pure Darkness. Again created by Dr. Blakk. Dr. Blakk had an arm replaced as his original arm was destroyed in the explosion. His new arm was metal and twice as strong. Blakk abandoned Pure at the age of 5 and Pure then lost it. He killed millions looking for the father that abandoned him. Blakk perfected the cloning machine and created two stable ponies.
Beta L-392 and Alpha E-601. Now we know what happened over the years so lets get back to Doom in current day Equestria.