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.
Characters in the Metroid series
The Metroid larva is chronologically the last Metroid of its race following the events of "" and "". Samus describes how a Metroid larva hatched from an egg and immediately imprinted upon her, believing her to be its mother. She brought the larva to Ceres Space Colony, where scientists learned that they could harness its power. Just after she left the colony, she received a distress call and returned to find the scientists dead and the larva stolen. The Baby Metroid is used as the driving theme of the game as Samus tirelessly searches through Zebes and eventually the Space Pirate's base on Tourian for her Metroid hatchling. Once encountering the enlarged Baby Metroid in Space Pirate clutches, it attacks Samus and nearly drains all her energy. During the final battle against Mother Brain, the Baby Metroid comes to aid of Samus by recharging her energy, but Mother Brain destroys it in retaliation. Samus avenges its death by destroying Mother Brain with an extremely powerful weapon given to her by the Metroid. After a planet-wide self-destruction, Samus for once mourns the death of a Metroid.