Gimmick Mountain Zone

General
Gimmick Mountain Zone, is the fifth level of the Game Gear / Master System Sonic 2. As with the other stages in this game, Gimmick Mountain Zone consists of two standard Acts followed by a shorter, third Act which contains the Zone's boss.

The zone bears hallmarks of Scrap Brain Zone from 16-bit Sonic 1; traps aplenty, conveyor belts, and those rotating circular disks which Sonic can somehow stick to the underside of. It is, however, clearly carved out of the inside of a mountain, as evidenced by the rocky backgrounds which Eggman has grafted his inscrutible technology upon.

Boss
Inobuta is Japanese for "wild boar", and you can see why. This metal-spiked kill-hog crashes from one end of the screen to another, dislodging heavy rocks from the ceiling when it impacts. On the plus side, it charges so hard and so fast that the mecha stuns itself when it collides with the side of the arena, retracting its spikes and giving Sonic a short window to do some damage.