Question: To play through Sonic Mania as Knuckles & Knuckles.
Options:
Make sure you've unlocked "& Knuckles" mode and have it on. Then start a game as Knuckles.
Make sure you've unlocked "& Knuckles" mode and have it on. Then load a game as Knuckles.
Answer: Make sure you've unlocked "& Knuckles" mode and have it on. Then start a game as Knuckles.