Sonic the Hedgehog 4 (8-bit)

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Sonic the hedgehog 4 (8-bit) is the sequel to the 16-bit Sonic 3, released in 1995 for the Sega Game Gear and Master System (MS only in Brazil) It reuses levels from the 16-bit sequels and some from the 8-bit games.
=== Plot: ===
The plot involves Dr. Robotnik discovering the Time Stones for the second time, he uses them to bring past locations of Sonic's adventures into the present, Sonic now has to recollect the Time Stones and defeat Dr. Robotnik with the help of Tails and Knuckles.
==Gameplay: ==
The gameplay remains the same as the 8-bit games, the zones are all given different layouts, some even having parts of their 16-bit counterparts.