Recommended Team: Sonic (Leader) & Tails (Partner)
The Eggman Robo is the first boss of Sonic Advance 3. It's a relatively simple fight, designed to introduce you to boss mechanics. The boss consists of a large robotic arm that swings across the screen and a small cockpit where Eggman resides. Your goal is to hit Eggman directly.
Phase 1: Swinging Arm
The Eggman Robo will swing its arm back and forth across the arena. You need to jump over the arm as it sweeps low and then jump onto the arm when it's high enough to reach the cockpit. The arm will also occasionally slam down, creating a shockwave. Jump to avoid the shockwave. Use Sonic's speed to position yourself correctly. When the arm is high, jump onto it and then jump again to hit Eggman in the cockpit. Tails' flight can give you extra height if you struggle to reach the cockpit.
Phase 2: Projectiles
After a few hits, the Eggman Robo will start firing small projectiles from its arm. These are easily avoided by moving or jumping. The core strategy remains the same: wait for the arm to be in a position where you can jump onto it and then launch yourself at Eggman. With Sonic and Tails, you can use Tails' Tag Action to get a quick boost in height, making it easier to land hits. Aim for about 6-8 hits to defeat the boss. The boss arena is flat, so there are no environmental hazards other than the boss itself.