Grodd

Grodd is a large gorilla that was experimented on by Davenport-Matthews Industries. After being implanted with bionics, Grodd developed abilities, becoming a near-unstoppable enemy of the Bionic Superhero Secret Service Division MKII.  Due to a rupture of time caused by the Bionic Superhero Secret Service Divsion, Grodd ended up as an aberration in 1967's Vietnam, starting his own cult and fighting the BSSSD, before being found and recruited to the followers of Mallus by Victor Krane. Upon their defeat, Grodd was presumably sent back to jail by the Time Bureau.