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.
Superman character and cast
Other enemies of note include the demon Satanus, the fifth-dimensional imp Mr. Mxyzptlk, the Ultra-Humanite, the imperfect Superman clone or duplicate Bizarro, criminal cyborg Metallo, the alien Amazon from Apokolips Lashina, Kryptonian criminal General Zod (and other Kryptonians imprisoned in the Phantom Zone for their crimes), the Parasite, the Prankster, the Cyborg Superman, Terra-Man, the Toyman, Composite Superman, Gog, and the Metropolis gang known as Intergang (which includes mad scientists such as Dabney Donovan and Thaddeus Killgrave).