This group exists primarily within the Sonic X continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
The Greenbots are a group that appears in the Sonic X comic series published by Archie Comics. They were a trio of green energy-powered robots created by Dr. Eggman.
When Dr. Eggman was using the Greenbots to drain energy from power stations, Sonic the Hedgehog and his allies confronted the trio of robots, and battled them in an attempt to defeat them. However, Eggman had his robots tap into the power of the Master Emerald, causing them to fuse with Chaos in order to form Chaosbot.