Does Sonic the Hedgehog Have a Post-Credit Scene?

Yes, there are extra scenes during, or after, the end credits of Sonic the Hedgehog.

During the first 1:40 of the credits we see an 8-bit retelling of some of the movie scenes.

After that there's an extra scene that is important for any Sonic fan to see. The extra scene is only about 30 seconds long.

There's nothing but rolling credits after that.

The credits run for approximately 9 minutes.