Well-known segment from the 1990s TV Show, Adventures Of Sonic The Hedgehog, based on well-known Video Game Franchise & Character Sonic The Hedgehog.
At the end of each episode, Sonic will give the viewers listens on how to keep up. It's infamously known as "Sonic Sez" due to Tails' attempt at spelling "Says".
It's used alot in memes and YouTube Poops.
"Sonic Says (Sez) that's no good!"