Stupid Chip

The Stupid Chip is a microchip that makes the one who uses it stupider. It debuted in the episode Grounder the Genius.

Known users
Dr. Robotnik (attempted to get the Genius Chip, but Sonic switched it with the Stupid Chip.)

Trivia

 * It's unknown what happened to it at the end of Grounder the Genius.
 * Its opposite counterpart is the Genius Chip.