Scratch and Grounder are a pair of fictional Badnik robots created by Dr. Robotnik as adversaries of Sonic the Hedgehog in the animated series Adventures of Sonic the Hedgehog. They form the greater part of Robotnik's "Super Special Sonic Search and Smash Squad" (often abbreviated to SSSSS Squad and, occasionally, 6-S). Scratch and Grounder were voiced by Phil Hayes and Gary Chalk, respectively. Scratch was originally voiced by Jim Cummings.
Scratch was originally created by Robotnik to be a super-robot that could easily catch Sonic for him, since all of his other mechanical bounty hunters fail. But unfortunately, the machine malfunctioned and gave birth to Scratch, a product almost exactly the opposite of what Robotnik wanted. Grounder is a sort of "clone" of Scratch. While being created by Robotnik in the cartoon, Scratch has his feather plucked and put into a cloner, but Scratch pulled another lever while it was cloning proclaiming "You forgot to pull this one!". Robotnik shouts back "I didn't forget to pull that lever! I'm not supposed to pull that lever!" and the result was Grounder, who had "slight modifications".
The two were occasionally aided by a robotic monkey named Coconuts (also based on an enemy from Sonic the Hedgehog 2), although most of the time, he would be competing with them rather than helping them, in hopes of being promoted out of janitor status.
Grounder is a small green swiss army knife-like machine with tank tracks, gauge for his navel and a plate that reads "K-14" on his back, as well as drills instead of his hands and nose. Grounder's design was purposefully derived from the Grounder from Sonic the Hedgehog 2's Aquatic Ruin Zone, though those Grounders (named "Handrill" in Japan) were mass produced, their color schemes were different, and they attacked by bursting out of walls. He is notably less intelligent than Scratch, but once acquired a chip that made him super-intelligent - it was subsequently lost. While Scratch seems to be the brains, Grounder is the artillery - his robot body is filled with accessories, which switch usually in his drill hands.
Scratch and Grounder also appeared in the earliest issues of the Sonic comic book published by Archie Comics. However, the characters themselves were prominently featured in their first appearance there, published in issue #2. Subsequent appearances of the two were minor; their last appearance in the comic was part of a flashback in issue #57. However,they (along with Coconuts) appear in issue #4. Later in the same issue, Scratch appears (without Grounder) in Tails' Little Tale. Grounder appears (without Scratch) in the story "Sonic Spin City!", published in Sonic Super Special #15. Scratch and Grounder, along with Coconuts, return to the Archie Comic in issue 187 as employees in Mammoth Mogul's newly renovated Casino Night Zone. Scratch has a job as the Concierge, while Grounder appears to be a chef.
Robots similar to Grounder appear in the 2006 Sonic the Hedgehog game.