'15 Golden Sonic

'15 Golden Sonic is one of the five threats in Five Nights at Sonic's, who later became a supporting antagonist in Five Nights at Sonic's Maniac Mania. '15 Golden was taken out to be shipped to the 2015 Sonic's Hero Pizza Palace location after being left alone in Sonic's Fast Food Diner for 24 years. '15 Golden was kept in the basement as a backup character on the condition if anything happens to one of the main clones. As of Five Nights at Sonic's Maniac Mania, he's voiced by Marp (who also voiced '17 Golden Sonic, '27 Golden Sonic, Nightmare Golden Sonic, and Dr. Golden) and his laughter is provided by Callilope.

Appearance
'15 Golden Sonic takes a similar appearance to Origin Sonic, but his eyes are completely red in color with white pupils (this was seen in his jumpscare in the first game) and his shoes changed from green to blue (the straps remained white). His attire is a black top hat, but lacking a bowtie, and unknown grey liquid seems to leak from his eyes. In Five Nights at Sonic's 5: The First Chapter and Maniac Mania, he now has a red top hat with a matching colored bowtie and the grey substance is actually cloning material and his teeth are blood-stained because he bit Dr. Eggman, being responsible for the incident, The Bite of '91. Additionally his pupils are a lighter red. In '15's Hard Mode version, he's given a much more phantom appearance, resulting darker skin tone and having dark grey lines running down his body. His red pupil color completely fills his eyes.

Behavior
In Five Nights at Sonic's 1, '15 Golden Sonic will appear in the West Hall Corner camera. If his face is seen on the poster, that signifying that he's in the office. It's advised to flip the monitor up and back down to avoid getting jumpscared. Alternatively, '15 Golden Sonic will kill the player if they attempted to do a 4/X mode in the Custom Night. In Five Nights at Sonic's 5: The First Chapter, he'll act the same in the first game, except the fact that he replaces posters of Origin Sonic with his face. The strategy is the same, but his jumpscare is not a death screen. In the Chaos Mode of Sonic's Pizzeria Simulator, he'll randomly appear in the player's office. Like the first game and FNAS 5, the player needs to flip the monitor up to get rid of him. In Five Nights at Sonic's: Maniac Mania and its upcoming PLUS update, he's starts in the basement. It is advised to not charge the power while '15 Golden Sonic is located in the generator room or he'll destroy the generator. He'll proceed to go into the basement vent and teleport to a random camera. When leaving the cameras, '15 Golden Sonic will be at the office. The player can flip up the camera or put on the mask to get rid of him.

Quotes
"Your turn to be forgotten..."

"Let's reverse that mindset of yours now..."

"You look so empty... Eheheh... Just like I've felt for the past 24 years..."