Ridley (Metroid)
Ridley's status within the ranks of the Space Pirates is unclear, with some sources stating that he is the leader of the entire Space Pirate race, whereas others portray him as simply the Pirates' military commander or even a mere enforcer within the Pirate military ranks, subservient to Mother Brain or Space Pirate High Command. Regardless, he is consistently depicted as a ruthless and cunning tactician who never passes up an opportunity to bring his considerable ferocity to bear on the battlefield, opting to overwhelm his opponents with an unwavering onslaught of attacks from his mouth, claws, and tail. He is also incredibly cruel, actively taking pleasure in the killing and torment of others; at one point in the official manga he taunts Samus by claiming he may have devoured her mother's corpse after killing her, and a Space Pirate log entry in "Metroid Prime" notes that being the mainstay of the Pirate security force is "a job he will certainly relish."
Metroid II: Return of Samus
"Metroid II" is an action-adventure game in which the player controls the protagonist Samus Aran on the fictional planet SR388. In this side-scroller, players advance through the game by using Samus' weapons to kill a fixed number of Metroid creatures. The player is given a detector that displays the number of Metroids remaining in the area. Once all the creatures are eliminated, an earthquake occurs and the planet's lava levels decrease, allowing Samus to travel deeper through its tunnels. The Metroid creatures are encountered in different evolution stages of their development cycle: original, Alpha, Gamma, Zeta and Omega. The more developed the organism is, the stronger its attack. "Metroid II" features save modules located around the planet, which allow players to save their progress and continue in another session.