Sonic & Knuckles/Beta elements

Super Insta-Shield
At one point in development Super Sonic was supposed to have his own Insta-Shield which was Superior to its predecessor. The Super Insta-Shield would be activated the same way as the Insta-Shield but once activated it would send a gold wave of energy instead of white, have more range, and last a whole second before it would have to recharge for about 2 seconds. This was removed because if it was used, the game would freeze for about 3 minutes and for some unknown reason, send Sonic to Hidden Palace zone then after the game would crash.