Ridley (Metroid)
Often considered one of the most memorable Nintendo villains, Ridley has been a mainstay of the series, having appeared (through various incarnations) in almost every "Metroid" game to date (all but "", "Metroid Prime Hunters" and ""). He has also appeared in the "Super Smash Bros." series, however, he had not been made a playable character until "Super Smash Bros. Ultimate" in 2018, making it also the first game overall to have Ridley as a playable character.
List of Spider-Man and His Amazing Friends characters
Electro was the main villain in the "Spider-Man and His Amazing Friends" episode "Videoman" voiced by Allan Melvin. He later made a cameo appearance in "Attack of the Arachnoid".