History of character has not yet been written.
- This version of the Brain, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 1 Appearances of Brain II (Earth-Two)
- 1 Images featuring Brain II (Earth-Two)
- Quotations by or about Brain II (Earth-Two)
- Character Gallery: Brain II (Earth-Two)