The red Sand Crab badnik, usually known as “Crabmeat”, has been a staple of the Sonic series throughout its life. Here’s a short history of sprites of this enemy usage.
While you’re waiting for ‘Team Sonic Racing’ next year, why not give ‘Sonic Robo Blast 2 Kart’ a go? A fan game using the ‘Doom’ / ‘SRB2′ engine which was released today. Check it out here: https://mb.srb2.org/showthread.php?t=43708
Goggles were going to be a power-up in the original Sonic The Hedgehog. Goggle monitors and sprites for Sonic’s head were found in the ROM data. It was most likely to let you breath underwater.
This was added as an extra debug monitor in the iOS remake of the game.