Retro Rumbler has a bulky CRT monitor for a torso, flickering with static and flashing classic game menus. His joystick-hand fists pound the ground, sending shockwaves through the digital battlefield. Rows of glowing buttons line his arms, each capable of firing pulse blasts or activating energy shields. His legs are thick mechanical pistons, stomping with rhythmic power. Retro Rumbler moves with chunky, deliberate steps, like an arcade cabinet brought to life for brawling glory.