The following is an overview of the various villains featured in the long running Super Friends franchise.
Legion of Doom
The Legion of Doom is a fictional group of supervillains led by Lex Luthor that appeared in Challenge of the Superfriends, an animated series that starred superheroes from DC Comics.
In each episode they appeared in, the Legion of Doom enacted various plots against the Super Friends, only to be met with defeat by the end of the story. Often, however, they escaped capture through a last-minute plan.
The Hall of Doom was often positioned in a swamp outside Gotham City. It resembled Darth Vader's helmet. It could fly and be remote-controlled, and travel through time and another dimension. The Legion of Doom often used it to escape, for example rays from it could teleport the Legion. The group returned infrequently, notably in the Challenge of the Superfriends inspired Legends of the Superheroes.
Bizarro
Bizarro appears in the animated television series Challenge of the Superfriends (1978) voiced by William Callaway; Super Friends (1980 - 1982) and The Super Powers Team: Galactic Guardians (1985 - 1986) voiced by Danny Dark. He is seen as a member of the Legion of Doom as an unambiguous villain. In one story he shows knowledge of how to construct a Growth Ray that makes someone 100 feet tall. Bizarro appears in the 1980s revival of Super Friends. In "The Revenge of Doom", Bizarro is seen with the Legion of Doom when they get back together. In two other episodes, Bizarro is a lone villain. Bizarro appears, voiced by Danny Dark, in "The Bizarro Super Powers Team", an episode of The Super Powers Team: Galactic Guardians. This version is a more faithful adaptation from the comics as a well-meaning bumbler.
Bizarro World
Bizarro World makes its first television appearance in Super Friends in the episodes "The Revenge of Bizarro" from 1980 and "Bizarowurld" from 1981. Bizarro World also appeared in the episode "The Bizarro Super Powers Team" from The Super Powers Team: Galactic Guardians. Bizarro World is populated by countless imperfect duplicates of Supermen and Lois Lane, led by Bizarro #1.
Black Manta
Manta appeared on The All-New Super Friends Hour, where he was referred to simply as "Manta" and his suit color was now olive brown.
Black Manta also became a part of the Legion of Doom in Challenge of the Superfriends, where he was voiced by Ted Cassidy. He is never shown without his helmet here. In the episode "Doomsday", when he, Sinestro and Cheetah are abandoned by the rest of the Legion of Doom he takes control of a mental device to capture and punish the rest of the Legion.
Brainiac
Ted Cassidy voices Brainiac in Challenge of the Superfriends, and Stanley Ralph Ross in Super Friends including Super Friends: The Legendary Super Powers Show and The Super Powers Team: Galactic Guardians. Brainiac also appeared in a Super Friends short episode "Superclones" where he ended up cloning Aquaman and El Dorado. He was voiced by Stanley Ralph Ross, who took over for the late Cassidy in 1980. The mechanical version of Brainiac appeared in Super Friends: The Legendary Super Powers Show in the episodes "The Wrath of Brainiac" and "The Village of Lost Souls" again voiced by Stanley Ralph Ross. In "The Wrath of Brainiac", Brainiac reveals that he shed his earlier appearance when he worked alongside Darkseid. Brainiac next appeared in The Super Powers Team: Galactic Guardians episode called "Brain Child" once again voiced by Stanley Ralph Ross.
Captain Cold
On the ABC animated series Challenge of the Superfriends, Captain Cold is one of two Flash villains (along with Grodd) that appear as members of Lex Luthor's Legion of Doom. Dick Ryal provided the voice of Captain Cold. This version of Captain Cold was depicted as having pale blue skin.