Orbinaut (Sonic the Hedgehog 3)

Orbinaut (Pola ポーラ) is a metallic gray variety and appears in the Launch Base Zone from Sonic the Hedgehog 3. It keeps the four spiked balls around it for defense, and only move when the player also move. It can only be defeated while the player is invincible or with a well-timed Insta-shield move by Sonic (or when Sonic takes a hit, he has a quick moment to hit it when he's flashing). Though the latter is hard to pull off, it is possible with correct timing.