Ridley (Metroid)
One of Adam's final missions to Samus is to finish off Ridley, whom Adam fears might be more dangerous than the Metroids if left unchecked, and claims Samus is the only one capable of stopping him. However, Samus later discovers his corpse after he is killed, having had his energy drained by the Queen Metroid on the Bottle Ship. His mummified corpse turns up again in "Metroid Fusion" on the BSL station, after having apparently been removed from the Bottle Ship by the Galactic Federation and placed in a sub-zero storage room for further research (potentially into further bioweapon applications). It is later infected by an X Parasite, allowing it to gain the ability to transform into Ridley's likeness, known as . Samus later defeats the Ridley mimic and absorbs its Core-X, regaining her signature Screw Attack. What was left of the cloned Ridley's remains were destroyed along with the X when the BSL station crashed into SR388.
Metroid
"Metroid", "", "Super Metroid", "Metroid Fusion", and "" were all developed by Nintendo's internal R&D1 division. The games which have been developed by separate teams are "Metroid Prime", "", "" and "Prime 4" (Retro Studios), "Metroid Prime Hunters" (Nintendo Software Technology Corporation), "Metroid Prime Pinball" (Fuse Games), and "" (Project M). The central figures in the production and development of the "Metroid" series are Satoru Okada, who directed "Metroid" and created the series; Yoshio Sakamoto, who acted as a character designer for the first game and has directed or supervised the development of most of the subsequent games; Gunpei Yokoi, who headed the R&D1 division and produced the first two games; Makoto Kano, who wrote the scenario for "Metroid", co-designed the second game, and produced the third; and Hiroji Kiyotake, who designed characters for the original game. "Mario" and "The Legend of Zelda" creator Shigeru Miyamoto was involved with the "Prime" trilogy, having been the one that suggested Retro to work with the franchise.