Game info: The Unversed equivalent of a Shadow. Agile, but otherwise unimpressive.

Wiki info: The Flood is an Unversed that is found in Kingdom Hearts Birth by Sleep and Kingdom Hearts III. It is the most common form of Unversed. Floods appear in the lobby of Monsters, Inc. along with Spiked Turtletoads, much to Sora, Donald, and Goofy's confusion, as they are not familiar with the Unversed. Goofy later remembers that Yen Sid had warned him about them, and that it had been a very long time since they appeared. Floods are seen entering doors to scare children and collect the energy from their terror. The Flood is a sleek, humanoid creature with blue skin. Its arms and legs end in points and have no distinct digits. It has a triangular head with two long, jagged, lightning bolt-shaped antennae reminiscent of the Unversed symbol. Its red eyes are set in an angry expression, and it moves in a jerking, twitchy motion. While most Floods are roughly the size of a Shadow Heartless, some in the Keyblade Graveyard are shown to be quite large. It is the only generic Unversed that does not have an Unversed emblem on its body. Like all Unversed, the Flood is created from a negative emotion. In Kingdom Hearts Birth by Sleep Final Mix, the Flood receives a palette swap which gives it a purple body and fuchsia antennae. Interestingly, the Flood's behavior mimics that of a Shadow, the basic form of Heartless[?], and a Dusk, the basic form of Nobodies. Like Shadows, the Flood is able to sink flat into the ground and become temporarily invincible. Like Dusks, a Flood's body stretches and contorts when it spawns. A "flood" is an overflow of an expanse of water that submerges land. This could refer to the danger Floods pose in great numbers and their blue coloration, as well as "overflowing emotion". Floods act much the same as in Kingdom Hearts Birth by Sleep, and pose little threat individually. Like their Shadow counterparts, Floods can be forced to emerge while sunk into the ground by hitting them with Water attacks or magic. They are also weak to Blizzard attacks. Watch for when the Flood prowls around or temporarily retreats, as this signals when it will attack. Floods encountered in the Keyblade Graveyard are unable to sink into the ground.