This article pertains to the beta elements of Sonic the Hedgehog 3 & Knuckles.
|Button||A button with unknown purpose. It can be placed in Carnival Night Zone via Debug Mode but does nothing when pressed.|
|Breakable block||This block glows and is breakable by jumping on it. It can be placed in IceCap Zone via Debug Mode.|
|Lift||A platform that is not used in any level. Its graphics match Launch Base Zone. It has no movement of its own.|
These songs can be heard in the Sound Test.
|$26||The credits theme for Sonic the Hedgehog 3. It was replaced with the Sonic & Knuckles credits theme instead.|
|$32||A short "Game Clear" jingle from Sonic the Hedgehog 3, which is not heard with the lock-on technology. A longer version of this jingle can be heard at the end of the credits medley.|
Sounds from Sonic the Hedgehog 3 still exist in this game.
|$3A||A shield sound leftover from Sonic the Hedgehog 2.|
|$40||An electric zap. This sound would later be used for the Thunder Shield in Sonic Generations and Sonic Lost World.|
|$5A||Sounds like something revving up. It would later be used in Sonic 3D Blast.|
|$6B||Sounds like a higher-pitched version of the sound heard when hitting an R, Up or Down block in the Special Stage from the original Sonic the Hedgehog.|
|$6D||Sounds like a door closing.|
|$71||Duplicate of $3A.|
|$7D||Sounds like mild rattling.|
|$84||Sounds like something charging up. It only seems to be referenced in some Zone with a high level ID which is composed of garbage data.|
|$85||This would have been used in cooperation with $84.|
|$8D||A very quiet sound.|
|$8E||Another electric rev-up sound.|
|$99||A small "tick" sound.|
|$A1||A low-humming sound. This sound effect is used by the Stardust Speedway Zone Act 1 boss in Sonic Mania.|
|$A5||Sounds like something rising or powering up.|
|$A6||A dashing noise.|
|$B5||The sound effect of the breakable diamonds in the Special Stage from the original Sonic the Hedgehog.|
|$D1||A very faint sound that may sound like static.|
|$D6||Some sort of rumbling/electric sound.|
|$D8||Sounds like a screeching warning siren. It was used in the November 3rd, 1993 prototype when Robotnik appeared behind the trees at the end of Angel Island Zone Act 2.|
|$DD-$DF||Sounds of duplicates for $DB when running across water in Hydrocity Zone.|
- on .