The Fighting Gloves are a pair of gloves exactly like Knuckles' normal gloves but are colored yellow with green cuffs. They allow Knuckles to charge up his power and release it on a group of enemies as a move called the Maximum Heat Knuckles Attack. The Fighting Gloves are the equivalent to Sonic's Ancient Light.
In gameplay, this Level Up Item is an optional upgrade and is not mandatory for clearing later stages.
The Fighting Gloves are found in the jungle area of Mystic Ruins after Knuckles defeats Chaos 4. The player must go to the location of Big's hut and begin climbing up the rock wall behind it. After some time, a wide ledge will appear on the right. The player must climb over to this ledge, and the Fighting Gloves will be found at the far end of that ledge.