How to get Knuckles in Sonic Speed Simulator To get to Emerald Hill, first off, you need to complete the second zone, Lost Valley obby that’s located in Green Hill Zone.

Sonic Speed Simulator features the titular character teaming up with his friends and going on an adventure across various worlds.

Sonic Speed Simulator for Roblox adds new characters every other update, and Knuckles the Echidna wraps up the classic character roster nicely.

Sonic Speed Simulator is quite a popular title on Roblox. To celebrate the iconic character's birthday, the studio has launched the Birthday Bash Event.