When it comes to characters that have been around the longest in the "Sonic the Hedgehog" movie franchise, one that I'm sure people remember is Agent Stone, the assistant to Jim Carrey's Dr. Robotnik.

Agent Stone becomes a breakout character ... Although he appeared in the post-credits scene for Sonic 2, Keanu Reeves didn’t make his entrance as Shadow until the latest entry, when an old ...

Lee Majdoub returns as Agent Stone, loyal follower of Dr. Robotnik, with a sharper look and new tech. Armed and ready, Stone’s allegiance to chaos is stronger than ever in Sonic the Hedgehog 3.