The E-1003 Cameron is a turtle-shaped E-Series robot created by Dr. Eggman. This robot appears in Sonic Heroes and always remains in one spot, trying to blast enemies with its energy cannon. Its armoured shell protects it from all but the strongest of power-type attacks, however it can be flipped over by a speed-type character's tornado attack, exposing its vulnerable underbelly.
A gold-shelled version of Cameron also exists, which is immune to even power attacks. It can still be flipped onto its back by a tornado move, however, and destroyed by striking its belly.