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.
Metroid
Comics and manga have been made for various magazines based on "Metroid", "Super Metroid", "Metroid Prime", "Metroid Prime 2: Echoes", and "Metroid: Zero Mission" in both the United States and Japan. Samus Aran and other "Metroid" characters also featured in the "" comic books by Valiant Comics. In Japan, six short "E-comics" were created to chronicle Samus' life and were published by Kodachi. Also in Japan, Comic Bom Bom published a three-volume manga starring Samus called "Samus and Joey" (メトロイド サムス&ジョイ).