The Classic Version: Alter '15 Golden Sonic
from Five Nights at Sonic's: Mega Merge Max Mix
(Alternate Maniac Mania - "Extra" Comic)

Which will later turn into The Modern Version: '15 Golden Sonic "Memorize-Up!"
He appears in Five Nights at Sonic's 1: Insane Immerse
(Pizzeria on South Island - Addon Comic) /
Five Nights at Sonic's: Fierce Forces "Imagine It!"
(Arcade Machine in Dr. Golden's Prep Mean Haze Citadel on Angel Island
- Main Comic)

'15 Golden Sonic "Memorize-Up!" also appears in
Five Nights at Sonic's: Fierce Forces "Entertain Entrapment!?" (Fangame)