- If you complete Sonic 3 & Knuckles with all Super Emeralds as Sonic and/or Tails, a short scene is shown on a restored Angel Island Zone - after the Floating Island rises, Knuckles runs past the Master Emerald to see them off.
- The three finally teaming up after Knuckles realises he's been duped.
- An easily miss-able one, but in Sky Sanctuary Zone as Sonic and/or Tails, Knuckles will jump onto an activation switch and you'll have to leave him there. Positioning exactly the right place beside him and looking down will lead Knuckles to point forward as if to say, "I'm fine, go on without me!"
Heartwarming / Sonic 3 & Knuckles