Egg Wrecker
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The Egg Wrecker (also known as the Egg Mobile-H) is the first boss in the original Sonic the Hedgehog, appearing as Dr. Eggman's Egg Mobile with a checkered wrecking ball attached to the underside. It crosses over into the Super Mario franchise in Mario & Sonic at the Olympic Games Tokyo 2020 as the boss of the first stage of Tokyo Sky Flight, where Dr. Eggman rides a giant version with his normal Egg Mobile nested inside. At first, it swings the wrecking ball back-and-forth while flying around the screen, though after enough damage, the wrecking ball instead starts making full 360° loops around the machine. After the health bar has been depleted, the giant Egg Wrecker is destroyed and Dr. Eggman escapes in his normal-sized Egg Mobile.