The engineers tried everything to make it behave. To slow it down. Once, they even tried to weaken it and leave it open to new ideas using a special device. Instead of coming off after five seconds, the device clung to its brain like a tumor, enhancing its strength and generating an endless stream of ideas that would normally be terrible to us.
— Anonymous Scientist
Really Happy Mouse
Species: Mouse
Gender: Male
Color(s): Black, white, red
Starting location: Pirate Caverns
First appearance: Night 6

Really Happy Mouse is a secret character that can only be found if you skip Nights 1, 4, and 5 in that order. He is also based off of the game of the same name.

Appearance Edit

Really Happy Mouse looks similar to Suicide Mouse, but his shorts and shoes are white in color and he has black buttons. He has blood stains on his clothes, face and ears. He also has an elongated tail. His head is deformed, causing his ears to be placed at the back of his head rather than the sides. His mouth is full of extremely sharp teeth, and is curving upwards towards the top of his head. His face is visibly melting, and his eyes are coming off of his head, but they are still attached by a few strands of optic nerves.

Locations Edit

He is seen on all cameras and in all rooms of Pirate Caverns, including the entrance to the caverns.

Behavior Edit

He has no set pattern of movement, and teleports around the location at breakneck speed.

Quotes Edit

"S M I L E"

"No puppet strings can hold me down."

*psychopathic laughing*

"This place must become happier. Much happier."

"A little pain goes a long way."

Trivia Edit

  • His screech originates from one of the screams from the original games.
  • If he kills you, the game crashes.
  • Sometimes, images from the original game will flash on screen while he is active.