The Octus (オクター,Octar?) is a recurring enemy in the Sonic the Hedgehog series. It is a mass-produced, octopus-based Badnik created by Dr. Eggman that can float in the air and shoot energy projectiles from its small snout.
Octuses are based on the octopus. They have pink round heads with black eyes, small corkscrews ears on each side of their head and a tiny snout. Their most noticeable feature are their six mechanical tentacles on their lower body which they can use as a propeller. These tentacles have small suction cups. Their lower body where their tentacles connect are yellow on the middle section and blue on the bottom. In Sonic Lost World, the Octuses received eyelashes and cyan eyes.
Sonic the Hedgehog 2
In Sonic the Hedgehog 2, Ocutuses appear sitting on the ground in Oil Ocean Zone, mostly at stair sections. Here, there can be up to two Octuses in one area. When seeing the player, the Octuses will start hovering up in the air by spinning their tentacles and then shoot one, small energy projectile straight ahead. They will then land in the same place to repeat their attack pattern after a while.
The player has to avoid the Octuses' projectile while moving forward, although this might be challenging due to the game's fast pace. Other than that, the player can destroy these Badniks with a Spin Jump or Spin Dash.
In Sonic Free Riders, the Octus makes a cameo appearance in the form of two different Action Items which can be obtained from Item boxes: Octo-Ink and Octo-Boost. Each item resembles a minature version of the Octus, but with a button on top. In gameplay, the Octo-Ink can obscure opponent's view with ink, and the Octo-Boost can provide the user with a brief speed boost.
Sonic Lost World
In the Wii U version of Sonic Lost World, the Octuses served again as enemies. During the game, all Eggman's Badniks, including the Octuses, got hijacked by the Deadly Six. In this game, the Octuses mostly retained their original design from Sonic the Hedgehog 2.
In Tropical Coast Zone 4, lone Octuses can be found sneaking on water surfaces. In Frozen Factory Zone 4, some Octuses will float up from oil pools inside the factory section and fire projectiles. Finally, in Silent Forest Zone 3, Octuses will skate with their tentacles towards the player while firing projectiles.
Mario & Sonic at the Rio 2016 Olympic Games
In Wii U version of Mario & Sonic at the Rio 2016 Olympic Games, two Octuses serve as hazards in Duel Beach Volleyball event. As the platform moves in-between mesh fences, Octuses fire projectiles upwards or towards players, as projectiles can stun players (as well decreasing of 20 duel points) or change the flight direction of the volleyball.
Powers and abilities
Octuses usually sit on the ground motionlessly with an angry stare until the player approaches. Once they spot the player, Octuses will open their eyes and starts floating into the air and shoot small, yellow projectile from their small snout. They then fall back on the ground and repeats the same pattern.
In the Simon Wai prototype of Sonic the Hedgehog 2, there is another movement for the Octus Badnik after shooting its energy projectile, as it then starts quickly fly away horizontally if the player is approaching it. The movement has been later removed from final version of the game. Additionally, it is internally called "oct".