Who is Sonic's sidekick?

Tails is Sonic the Hedgehog's sidekick and best friend. He is a young two-tailed fox with the ability to fly using his tails, which not only makes him a valuable companion for Sonic during their adventures but also enables him to keep up with Sonic's incredible speed. Tails is known for his loyalty, intelligence, and engineering skills, often using his technical expertise to assist Sonic in overcoming obstacles and defeating their enemies. Together, Sonic and Tails make a formidable team, working together to protect their world from Dr. Robotnik's evil schemes.