FG II-Graham is a a mass-produced guard bot from the Metroid series.
Three of them are encountered by Samus in the Biosphere in Metroid: Other M, and she battles several more at later points in the game.
They are floating turrets that ram into her and fire beams at her. They are only vulnerable when they are charging their fire. The defeat of the first group of them rewards Samus with the Diffusion Beam.
Grahams alone are known to fire and ram, but later on, a pair of them fire concentrated electricity, shooting through transparent and semitransparent obstacles.
They are encountered again in a Pyrosphere corridor, but since Samus has the Ice Beam and Wave Beam by that time, she can pierce their armor with uncharged shots at any point.
They also appear in zero gravity areas near Sector Zero and in the Bioweapon Research Center.
They resemble the Tau Drones from Warhammer 40,000.
In Super Smash Bros. for Nintendo 3DS and Wii U
These turrets appear as a stage hazard in the Pyrosphere stage, alongside Ridley, Joulions and Zeros. They fly in at the fighters from above and fire lasers straight ahead when attacked. You can use these lasers to attack the other fighters, they can also be used to attack the Ridley stage boss.
"In Metroid: Other M, Samus usually has to face these mobile turrets two at a time. They change speed as they fly around, firing laser beams from their large guns. In the Smash Bros. Pyrosphere stage, they fly in from above and fire lasers straight ahead when attacked. Use those lasers to hit the other fighters and Ridley!"