The Alone Group is a group of echoes heard in the climax of the episode "SB-129." They are voiced by all cast and crew members of the show, including Tom Kenny.
They are the word "alone" that appear in many different ways. They all only say the word "alone."
Role in episode
They are heard after Squidward ends up in the end of the time period called Nowhere, so says "I may have finally found a place where I can be all... alone!" They echo the word 'alone' many times in various different voices (including that of the French narrator), depicting a very strange alternate-reality to which Squidward had traveled to in his attempt to escape the past.
Squidward soon panicked after hearing the echoes, thinking someone was after him. It is possible that the alone echoes were from Bikini Bottom residents from the future who used the time machine and ended up in Nowhere years before Squidward had. It could also be possible that the alone group is actually just an echo of Squidward's voice, which seems logical as Nowhere is a small but infinitely looping space (as seen when Squidward attempts to escape from the realm by running out of it, but ends up running in a never-ending loop).
In total, the word "alone" is shown thirteen times in this group. (being spelled backward in the upper left)
The word alone is heard sixteen times during the scene.
The words all have different fonts, shapes, and sizes.
The words are all said in the same way.
When Squidward appeared in the past, his time machine was with him, but for some reason, when Squidward visits the Realm of Nothingness, he's seen without it. The realm exists on top of the time machine, which didn't happen previously.