Sleepytime is a large, sleepy robot that casts a light around its personal space.
Sleepytimes are first encountered at the beginning of the Rock Bottom level and are among the most difficult robots to deal with in the game. There are many ways to deal with a Sleepytime but the most common way is to sneak by them using SpongeBob. However, there are times when the player will run into two or three Sleepytimes next to each other, where sneaking past undetected is impossible. A safe way to defeat a Sleepytime is to hit it from behind from a distance with SpongeBob's Bubble Bowl technique, but it must be out of the Sleeptime's light field or it will push the Bubble Bowl away. Another way is to sneak up on it from behind and attack it from there. The player must be careful when doing the latter method if there are more than one, as the other Sleepytime(s) will wake up and fire a laser beam.
This robot could have possibly gotten its name from "Sleepy Time."