Originally Posted by
Kuwagaton
I really need to catch up with that show.
For the longest time Brainiac was really carried by his extreme intellect. His technology was fantastic enough to give Superman fits, and he was petty enough to direct it to do all sorts of things, like blind Superman with the traumatic vision of Krypton's explosion or red sun missiles. Physically he used a force field as defense. When he became cybernetic I suppose he gained greater strength, but he was mostly just better adapted to technology.
Post crisis, his body is destroyed but his consciousness drifts into an earth psychic, and the result is that he gains psychic power control. So mind reading, illusions, mind projection, and psychic shockwaves that can cause damage. His ship and weapons were extensions of him self. Later on he just sort of doubles down on the tech thing again.
In most continuities we see him augment his body and a usual result is better remote control over electronics and super strength to boot.