Personal Info:
Real Name: Unknown
Also Known As: No known Alias
Place Of Birth: Project Cadmus
First Appearance: Superboy Vol.4 #99 (2002) Modern Age Villain
Known Associates: No known Associates
Group Affiliation: None
Base Of Operations: Project Cadmus
Grudges: Superboy
Creators: Dan DiDio, Jimmy Palmiotti and Anthony Williams
Enhanced Abilities: Doomsboy is probably the strongest being on the planet. His endurance and durability are also enhanced way beyond most superhuman levels. He can easily survive the rigours of space.
Invulnerability: Doomsboy is almost invulnerable to damage from physical and energy attacks.
Evolution: Doomsboy is constantly evolving past his opponents in order to beat them. This has included closing of his auditory canals, poison and retractable claws.
Healing: Doomsboy’s body has no internal organs or tissues and when damaged he heals almost immediately. He has even returned to life.
Bones: Doomsboy has bony protrusions coming from his body. He has even been able to fire the bones outward and retract them. He also seems to be able to administer a poison through his claws.
Leaping: Doomsboy’s highly developed leg muscles allow him to leap miles with a single bound.
Doomsboy was created when Bedlam tried to remove Superboy from existence by altering the past. To do so, he tampered with Project Cadmus' attempt to decipher Supermans Kryptonian DNA after he died. Because they could not clone Superman, Project Cadmus and Paul Westfeild ( a key player in Cadmus activities at the time) decided to clone Doomsday instead.
Eventually two clones were made. Doomsboy, the much smarter clone of Doomsday, and Conal (aka Superboy in this new reality) , the powerless clone of Superman. Westfeild raised Doomsboy as his son, while caring very little about Conal, who was considered Doomsboy's little Brother. Doomsboy was trained to take over the responsibilities of Superman, which he eventually did. And as the new man of steel, Doomsboy killed all his enemies and began to be known the world over as Earths new Superman. But Doomsboy secretly hated the Legacy he had adopted, eventually he took a more criminal turn, taking what he called "tributes" from various companies for keeping them safe.
Doomsboy at Superman Wiki
Doomsboy at Comic Vine