The Ring Spark Field is a recurring technique in the Sonic the Hedgehog series. When performing this move, the user unleashes a powerful electric field at the cost of lowering their speed.
The Ring Spark Field is a technique reserved for robots. When using this move, the user uses a radioactive force within them to create a powerful electrical field around them. In gameplay, anyone who touches the Ring Spark Field will take damage.
The downside to the Ring Spark Field is that it drains the user of so much of available energy that their mobility deceases considerably and leaves them worn down for a few moments.
Sonic the Hedgehog CD
The Ring Spark Field first appeared in Sonic the Hedgehog CD during Metal Sonic's race with Sonic on Stardust Speedway. When performing the Ring Spark Field in this game, Metal Sonic flashes red while releasing blue electrical charges. However, the attack's range is very limited.
In gameplay, whenever Sonic comes close to Metal Sonic while he is moving along the ground, Metal Sonic unleashes his Ring Spark Field to halt Sonic's advances.
In the console/PC version of Sonic Generations, the Ring Spark Field appears in the game's recreation of Classic Metal Sonic and Classic Sonic's fight on Stardust Speedway. In this game, the Ring Spark Field is colored yellow, and has a much further range than in Sonic the Hedgehog CD. Unlike in Sonic the Hedgehog CD though, Metal Sonic uses the Ring Spark Field in the air rather that on the ground. However, he can send two columns of electricity down to the road from the bottom Ring Spark Field where Classic Sonic is running, thus limiting the space he can run on.
When Metal Sonic is about to use the Ring Spark Field, he charges up the attack, which is signified by a pulsating electrical field surrounding him, before finally attacking. After using it, he will be left vulnerable to attack.
↑Sumo Digital, Feral Interactive (26 February 2010). Sonic & Sega All-Stars Racing (PlayStation 3). Sege, Feral Interactive. "Metal Sonic's character profile: He can mimic Sonic's spin dash and homing attack, and thanks to the jet engine in his torso, he can beat Sonic's acceleration and equal Sonic's speed! He has extra abilities however, due to his mechanoid form. These include his Ring Spark Field, telescopic limbs, and a forcefield known as the Black Shield."
↑ 2.02.12.2"El arma secreta de Dr. Robotnik" (in Spanish). Hobby Consolas magazine. August 1993. p. 21. "Another powerful attack Metal Sonic has is the "Ring Spark Field", a radioactive force that also has its disadvantages: the speed and energy of the robot decreases considerably."