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Goober, named by the game's community, is a harmless oddity found in The Poolrooms. Goober is referred to as "???" or "ARC-061" in Custom Mode, as he does not have an official name. His internal game files label him as "Blubberfuck", a name likely jokingly chosen as a placeholder by the developers and never meant for public discovery. His ARC designation is listed as "ARC-016" in the announcement for The Poolrooms update, likely the result of a typo. However, though less probable, it is also possible that this was his initial designation, later changed for lore-related reasons.
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=== Appearance ===
Goober is a chubby humanoid dolphin, with a round head, a dorsal fin, and humanoid limbs. Standing at 5'2", his small body and soft, rounded features contribute to his non-threatening and somewhat sweet look. His skin is blue, though lighting often gives him a grayish hue. He has pitch-black eyes, a mouth shaped similarly to an upside-down smile, and a tiny, almost unnoticeable nose. His hands are shaped like kitchen gloves, and his feet are entirely flat.
Goober has an idle animation, though it is almost imperceptible during gameplay. He can be seen subtly breathing, confirming that he has some anatomical functionality. This small detail is often missed by players due to him always teleporting before players can get too close.
Goober’s model used to be different from the one currently seen in the game. Initially, he was much smaller, roughly half the size of the player, and less chubby, with a more egg-shaped head and skinny arms. His original design turned out more unsettling rather than inviting. However, before The Poolrooms' release, he was redesigned to his current, more rounded and cute form. One of the developers mentioned that they prefer the current model far more than they ever liked the previous one.
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=== Behavior ===
Goober's behavior sets him apart from the other entities in The Classrooms, as he does not pose a direct threat to players but can still indirectly affect their survival. He randomly spawns within The Poolrooms, where he silently watches players from a distance. Goober's body and face are always oriented toward the player, even when his view is obstructed by walls.
If Goober is approached by a player while they are looking too closely in his general direction, he will instantly teleport, accompanied by a dolphin cackling sound. 
Goober’s behavior allows the player to be able to watch him safely, provided his body remains near the edges of the screen. However, if Goober is too close to the center of the player’s view, his teleportation will immediately trigger.
His cackling alerts every hostile entity and brings them to his location. Because of this mechanic, players are advised to avoid looking at Goober altogether. Instead, they should focus on the ground or use slow, deliberate camera movements to scan their surroundings without accidentally bringing him into the center of their view. This careful approach minimizes the chances of triggering his teleportation and allows the player to navigate past him safely.
If the entities take too long to reach goober's location after they have been alerted, they'll resume wandering instead. This mechanic still causes Goober to bring danger closer to the player, essentially making him a snitch. There were plans to add strange effects that he later leaves behind after his disappearance, but they are yet to be implemented. 
If the player maintains a safe distance while obvserving Goober, he will disappear without alerting the entities. In either case, his disappearance causes vhs corruption, obscuring his teleportation process. This is likely a design choice made to create a more immersive, mysterious effect.
There are rumors that say that Goober assists the player by guiding them in the right direction, with some interpreting the wall text 'Friend?' as evidence of Goober’s friendly intentions. However, this claim has been proven completely false.
A sound similar to low-pitched ventilation plays when getting in proximity to an area goober is currently in. This disappears entirely when he teleports. Interestingly, this audio cue was removed or went missing in a later update for unknown reasons.
There is a decoy Goober that can be found in a high-up opening in The Poolrooms, regardless of him being enabled in Custom Mode or not. This version of Goober is entirely motionless except for its head that rotates toward the player, lacking the mechanics of the true entity. It is possible to get up to that opening to visit him using the flying glitch.
Interestingly, Goober has no collision with players, meaning they can pass through his model and literally look inside of him without obstruction. However, objects cannot pass through him, as his model does have collision for inanimate items.
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=== Lore Speculations ===
Goober teleporting when approached is speculated to stem from shyness or fear of the player.
Goober was confirmed to have an ARC document but is not in the game nor the game files. He is presumably uncontained.
There are writings on the walls that can appear in The Poolrooms, with one of them reading "Friend?", accompanied by a doodle of goober's face. This suggests he might be seeking companionship or attempting to communicate with players, giving the impression that he is an intelligent being. However, this could be a deceptive mechanic, encouraging players to approach him only to teleport away and alert hostile entities.
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=== Custom Mode ===
In Custom Mode, Goober has a single toggleable option, "Use Vents", which upon enabling will also forcibly enable "Break Doors", but these settings unfortunately don't do anything. The developers likely forgot to prevent players from interacting with the option, since it has no functional impact.