Lava Reef Zone

Lava Reef Zone is the fourth zone of Sonic & Knuckles and the tenth zone of Sonic 3 & Knuckles. It's the longest zone of any Sonic the Hedgehog game for the Genesis. It takes place in a network of mines and the volcano where the Death Egg crashed into at the start of the game.

In M.U.G.E.N., Lava Reef Zone was made by MGSSJ2.

MGSSJ2's version
MGSSJ2's version is ripped from the boss area from Lava Reef Zone Act 2, where the fight against Dr. Eggman takes place. This area is dubbed Lava Reef Zone Act 3 by fans, which is why this stage is referred to as Lava Reef Zone Act 3. The Death Egg can be seen from above. The lava in the stage is animated, but it doesn't scroll with the stage. The stage appears to be well-suited for small or chibi characters.