Objective: Find 3 Master Emerald pieces.
Knuckles' version of Speed Highway is a treasure hunt through the city. Unlike Sonic's speed-focused run, you'll be using Knuckles' unique abilities to explore. Start by activating your radar. The emerald pieces are often hidden in high places, behind breakable walls, or in less obvious corners of the stage. Use Knuckles' glide to cross large gaps between buildings and reach rooftops. Climb walls to access elevated platforms and secret areas. The radar will beep faster as you get closer to a piece, and the color of the radar will change (green for far, yellow for medium, red for close). Don't be afraid to backtrack and explore thoroughly. Break any suspicious-looking walls or objects, as they might conceal an emerald piece. The pieces are randomly placed within a set of possible locations each time you play, so memorizing exact spots won't always work. Focus on systematic exploration and your radar.