Mechanical fish are large black bass-like robots with turquoise armor. Physical traits each unit possess include thick purple lips, a dorsal fin, two pelvic fins and one tailfin. Each fin appendage has a yellow membrane and a blue spine.
Mechanical fish usually weigh about between 1,520 - 2,400g. Unlike other robot enemies in the game, mechanical fish cannot be destroyed, as the player's focus is on catching them by fishing. Catching a mechanical fish awards the player with points that depend on its weight.
The various missions that Big can find the mechanical fish include:
|14||I am the keeper of this hotel! Catch me if you can!||Station Square, between the station entrance and underground parking lot.||Fish for the mechanical fish in the hotel's pool.|
|29||I am the keeper of this canal! Catch me if you can!||Station Square, garden to the right of Town Hall where there will be an egg-shaped stone.||In the water way behind Twinkle Park elevator (just under where Tails can find the Jet Anklet), a mechanical fish swims. Fish for it.|
|35||I am the keeper of this icy lake! Catch me if you can!||Mystic Ruins, In the caves leading to Mystic Ruins Garden, enter the caged Kiki cave, right behind the mound of dirt.||Fish for the mechanical fish in the pool in the ice cave near the ladder to Icecap.|
|44||I am the keeper of this ship! Catch me if you can!||Egg Carrier, port side stern of the ship (very corner of the Egg Carrier).||Fish for mechanical fish in Eggman's swimming pool.|