Bio: Once Brainiac was the sophisticated artificial intelligence
system that guided and catalogued every phase of Krypton's existence.
Then, when Jor-El revealed that Krypton was doomed, Brainiac lied about
the scientist's findings, playing for time until he could safely beam
himself away from the ill-fated planet. Over the years Brainiac has
visited many worlds and has gradually taken on the form of a human-like
android. One thing remains unchanged however: Brainiac's all-consuming
lust for self-preservation and conquest.
Now Brainiac has come to Earth. Upon his arrival, Brainiac contacted Lex
Luthor in the hopes of using his technology to suit his needs. While
here on Earth, he's finally encountered the one foe strong enough and
smart enough to fight him -- the son of his old enemy Jor-El, Superman.
Bio (Cartoon Network): In his original incarnation, Brainiac was
a sentient computer system created on Superman's home planet, Krypton.
While he was built with good intentions, Brainiac's directives reflect
only self-preservation and greed. Misleading Krypton's scientists
(including Superman's father, Jor-El) about the fate of their doomed
home world, Brainiac managed to beam himself from the planet before its
ultimate demise. Over many years, Brainiac wandered from galaxy to
galaxy, acquiring knowledge and a humanoid form in the process. Upon
reaching Earth, Brainiac soon discovered that our planet offered a
wealth of new information. As he had done with other worlds, Brainiac
was intent on annihilating the Earth after obtaining its data. Of
course, Superman - Brainiac's first worthy opponent - was not going to
allow such callous destruction.