Talking Rocks are obstacles in the Eggnic series.
First appearing in Splooshnic Crackers, Talking Rocks posed trivia questions to Splooshnic as he made his way through Snow Tower. One set of rocks asked Sonic the Hedgehog questions, while another posed MOTHER questions. Failure to answer correctly resulted in battling Ice Goblins.
Less talkative rocks have appeared throughout the series, usually just shouting "ROCK!" when spoken to. These rocks have become a staple of the series, and are a frequent obstacle.