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This article pertains to the beta elements of the Master System and Game Gear version of Sonic the Hedgehog.

Lost Badniks

Sprite Name Description
S1 Enemy2 Unused Newtron These unused sprites can only be found in the Master System version of Sonic the Hedgehog's Green Hill Zone. The animations go unused, but an alternative one is used in Jungle Zone instead. It appears to be a version of the Newtron, which appeared in the 16-bit version of the game.
Missing Bat Brain Unused Enemy These unused Bat sprites can only be found in the Game Gear version of Sonic the Hedgehog's Green Hill Zone. It appears to be a version of the Batbrain, which appeared in the 16-bit version of the game.

"RING" Hud

Ring

"RING"

One of magazines shots features the screenshot from possible, earlier build of the original Master System game with the hud spelling "RING" instead of "RINGS".

Unused Marble Zone BGM

An unused 8-bit variation of Marble Zone's background music can be found in the ROM data of the Master System version of the game.

"©SEGA/Ancient 1991"

S1ancient

Ancient Corp. developed the 8-bit releases of Sonic the Hedgehog, and were evidently going to credit themselves on the game's title screen with the text "©SEGA/Ancient 1991". In the end, however, only SEGA received credit.

Unused level artwork

Game Gear only

Note that some of these objects are used in the Master System version of the game.

Sprite Name Description
S1 Totem
Unused totem pole These totem poles from Green Hill Zone are used in the Master System version but are left unused in the Game Gear version.
Sonic1SMSGreen
Unused corner tile These corner pieces from Green Hill Zone are used in the Master System version but are left unused in the Game Gear version.
Sonic1GGGreen
Unused checkered spike A checkered spike. Its purpose is unknown.
Sonic1GGFinal
Unused Sky Base slopes Some unused slope tiles.

Both versions

Sprite Name Description
S1 BridgeLostObj
Unused platform This platform has the same tiles as Bridge Zone. Its design almost looks like a small hill.
Sonic1SMSBridge
Unused spring and pole The spring seems to have a checkered pattern and the pole in front has some tiles that look similar to the ones from Bridge Zone.
Sonic1SMSJungle
Unused spring An unused sideways spring.
S1 LabyrinthLostObj
Unused object The tiles look similar to the ones in Labyrinth Zone. Its purpose is unknown.
Sonic1SMSLabyrinth
Unused pillars Pillars that appear to be meant for Labyrinth Zone.
Sonic1SMSFinal
Unused slopes and laser turrets These objects were meant to be implemented in Sky Base Zone.
Sonic1SMSSkyBase
Unused chain and cannon These objects were meant to be implemented in Sky Base Zone.
S1roundthingv1
Unused shield An unused sprite from an unused animation.

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