Scary Mike (stylized as ScaryMike) is an NPC that can be found in-game, but will not enter the elevator. Scary Mike appears as an all-brown blocky R6 rig. It has a smiling face with only its teeth being seen inside its mouth. It also has slightly bulging glowing red squares on its head, as well as a metal texture, while the rest of its body has a rugged texture. 

Scary Mike is an NPC that can be found in the Funny Maze floor wandering. It travels around the maze in a random pattern.

As Scary Mike is loose in the maze, it will lay out an inky black path that it will run across. Players who are in the way of the path and touch Scary Mike will instantly die as a result.

Scary Mike constantly emits low-quality footstep sounds, which can be heard when it's near a player. When a player dies to Scary Mike, a fall damage hurt sound, also low-quality, is also heard. 

I see scary mike as a really low quality, deep sounding maniac who kills people, so props if you can somehow make it sound low quality... (unless you just break your microphone of course LOL) 
https://regretevator.fandom.com/wiki/Scary_Mike