The Oni Room is an area in Version 3 and Version 6. It features a number of deformed monsters similar to the oni behind a locked jail cell wall. With the exception of the blob oni and blockman, none of the monsters introduced in this room chase the player. The oni room has become a popular icon of the franchise.
In many fangames, a reference to the original oni room is included, where a large room includes various onis. Many of the monsters shown here is what fuel the creation of fangames.
In Version 3 , the oni room is located at the top of the house, in the attic. The enigmatic, mysterious feel of the room is marked by the strange, angular puzzle and the odd, blue squiggles adorning the floors.
Between Version 3 and Version 6, the oni room switched buildings and appearance. In Version 3, the oni room is actually composed of two separate rooms. The oni room was omitted from Version 1 and Version 5 .
Simply walk past the bars and into the next room. The Blob Oni will move slowly to chase you, and reveal the front door key. Circle around him, grab the key, and leave.
When you enter this room, you will see several oni`s in this room behind a metal gate. The Hunchback Oni waits near the gate; when you approach it, the Hunchback Oni will open it and it will follow you, the Blockman Oni will be behind the Hunchback Oni. The door behind you suddenly locks. Press and hold the Up arrow key and as the oni is about to touch you, the door unlocks and you exit the room. Now return to the room and you will notice that all the oni`s have disappeared. Now you can proceed to approach the frame on the opposite side of the room and obtain a Blue Piece.
Many fans find the oni room to be one of the most mysterious and frightening moments of the game. Unofficial oni games have expanded past the original expanding the oni universe. Some of the oni`s seen in the oni room that don't have an impact on the game have even acquired specific personalities or characteristics among the fan community. Many times, fangames will include homage to the original oni room by incorporating a room much like it, filled with either the same monsters, or monsters unique to that game.
Many times, the oni room will even occur in the exact same way - the player may either accidentally set all the oni`s free like they do in Version 6, or have to obtain a key the oni`s are hiding in the cage like in Version 3.
The oni room remains a key aspect and motification in the oni universe.
The oni room introduced a number of monsters to the oni universe.
Blockman oni (sometimes just called blockman) is the only monster seen in the oni room that can be encountered during Version 6. In part of the Old Building in Version 6, blockman can actually appear and chase the player. From then on, blockman can also appear randomly. This monster has an odd attack pattern; blockman will sometimes freeze for a second and charge towards the player. It can also appear in regular gameplay instead of the Ao Oni through use of a cheat.
Hunchback Oni (Scooter)
Hunchback Oni (sometimes called Scooter) is a normal oni, though its back is hunched over and it is bearing teeth. It opens the gate in the Oni Room when Hiroshi approaches it, then proceeds to chase him.
The hulk oni (sometimes called Squatto or Billy Oni) is a large, muscled oni that can sometimes be seen banging his fists on the ground. In Version 3, this oni kills Mika by crushing her with his fists in this way. His rhythmic banging wakes Hiroshi from sleeping in the kid's bedroom. Because of its size, it moves slowly in most cases. He is so far the biggest of the onis.
The blob oni (sometimes called the Eye oni or Eye-see oni) is irregular. It looks like an amphorous mass with many eyes on it. This oni can chase the player in Version 3, where it is hiding the front door key, but it is very slow and can easily be tricked and outrun.
The caterpillar oni (sometimes called Jeremy) is a slow, sluggish monster. It looks like a caterpillar with its head up and has five eyes on each side of its many-legged body.
Encephalo Oni (Jellyfish Oni)
A fan favorite because of it's odd, comical appearance, the encephalo oni is sometimes also called Jellyfish oni, Octopus oni, Calmar oni or O-ging oni. The sprite for encephalo oni is crafted from the upper half of the original oni's face, and it is jellyfish like.
This oni resembles the regular Oni, but the sprite itself is completely warped.
This oni has spike-like protrusions from its head and floats back and forth without any other movement. and he can fly.
The oni resembles a clock with thorns, as if exploding, or a stalactite. It levitates while staying affixed to its position, one of the thorns stretching and shrinking continuously. It seems to be the satellite oni looking forwards.
A regular oni, but his image is stretched vertically. It is so far the tallest of the onis.
This oni is similar to the original, but it looks like the oni in the ending of 5.2, and it has deadly teeth.