A peculiar life-form that hovers above the ground with a mysterious force. Rumors say they came from outer space.
Biology
Physiology
S51 appears to be an extraterrestrial being. Its form is composed of a metallic disk-shaped body with a pale green head poking out, which has two small black eyes and tiny ear-like shapes. It has two purple appendages hanging from underneath it, acting as its arms.
Special abilities
One feature in particular stands out when observing S51, and that is their ability to hover. They can also fire a laser that can deal Fire, Ice, or Electric qualities (Laser Pulse).
Behavior
S51 are shy creatures that flee at the first sign of being discovered. They are fast and have been known to teleport (Ripley's Sidequest). They have been shown to respond to and obey their evolution, S51-A.
Habitat
S51 is a Pokémon rumored to originate in outer space. Its actual origin and habitat is unknown.
Italic moves get STAB only when used by an evolution of S51
Underlined moves are unavailable to a prior evolution(s) and/or will be completely unavailable upon evolving.
By breeding
S51 is genderless, it can't get any of the Egg Moves listed through natural means (unless learnable elsewhere such as via a Mystery Gift event, TM, and/or Move Tutor).
A shiny S51 was given out for the release of Beta version 4.2. This S51 came holding an Unidentified Fallen Object.
Design origin
S51 is based off an Unidentified Flying Object (UFO) of the standard "flying saucer" variety. Its green body likely references the idea of "little green men".
Name Origin
The S stands for subject, and 51 refers to Area 51.