Unused things in sonic the hedehog

1.This set of sprites showing Sonic falling or shrinking are not used in the game and their intended use is unknown, although it could have been used for the death animation, to simulate falling. It's also possible it could have been used for a speed tunnel which would first extends into the background. 2.The graphics were found hidden in the ROM. While the actual purpose of the goggles is unknown, it is speculated that they were meant to give Sonic the ability to breathe underwater. 3.This unused graphic can be found in the tileset for Spring Yard Zone. It is unused in the final game, and can be found in several prototype screenshots shown in magazine previews. 4.The left image shows the back of Robotniks legs which can't be seen normally. The right image is what is normally seen. 5.Rosebud with a incorrect pallette. It sort of bounces up and down and will bounce you backwards and make a noise similar to the round star objects found in Spring Yard Zone. 6.When using the level/act select PAR code FFFE10:???? and selecting the third act of Scrap Brain Zone by changing the question marks to 0502 you are actually taken to Final Zone. To actually reach the Scrap Brain 3 used in the game you have to select the fourth act of Labyrinth Zone by changing the question marks to 0103. This means technically Scrap Brain Act 3 is another level of Labyrinth Zone. 7.These spikes are horizontal, rather than the vertical spikes used in the final Marble Zone. They are also slightly thinner. 8.This unused sliding sprite is similar to the one used in Sonic CD's Wacky Workbench Zone. 9.These spindash-esque sprites were found in the final ROM, but their use is unknown. Some theories are that they were used for a move similar to the spindash or that they are animations for some sort of warp movement, perhaps through winding tunnels. It's also possible that a teleporter like the one found in the 8-bit version of Scrap Brain Zone would have played the animation. 10.This sprite shows Sonic standing while gasping for air. This was presumably used in Labyrinth Zone. 11.The two faces pictured here are not in their original palette, but these appear to be an earlier version of the faces on the totem poles of Green Hill Zone. 12.Does nothing. Found in various areas of Scrap Brain Zone in areas where the player can not normally access (such as inside walls, although it is possible to break one of them by "digging" into the wall in a jump and popping it, the image of the monitor being a portion of the "zappers"). 13.Does nothing. Is likely intended to hurt the player, as it does in Sonic the Hedgehog 2 (16-bit)'s 2-player mode. 14.The goggles, they do nothing! Most likely went with the unused Goggle graphics found in the ROM. 15.Does nothing. This monitor also appears in a Sonic CD prototype, where it grants the player extra speed and invincibility at the same time. That is likely the effect meant here as a Computer & Video Games issue eludes to a power-up which grants extra speed and invincibility. The S monitors were likely functional at that point. 16.As seen in a couple of prototype screenshots in magazines, Sonic appears to be striking a victory pose after passing the sign post. 17.Thought to be the original method of accessing the special stage, this warp effect activates when Sonic touches the area in which the object is placed. Sonic disappears as he runs into it, and a warping noise plays. Sonic then reappears a few seconds later, likely as a method of testing the object. 18:The checkered ball seen on the Green Hill Zone Boss appears to have been originally used in Green Hill Zone, as magazine pictures have shown Sonic riding down hills on it. 19.Goggles Each frame of the graphic fits together with one of Sonic's poses. 20.Though this floating sprite is used in Sonic 2, it is not used in Sonic 1 except during a split second on the "Continue" screen. Note the lack of a stripe on his shoes. 21:This animation shows Sonic holding his breath while running. It is speculated that this was used during the countdown to signify no air is left for Sonic.