The Shisaku-gata Jet (試作型ジェット Shisaku-gata jetto?, lit. "Prototype Model Jet") is a type of Badnik created by Dr. Eggman and Doctor Eggman Nega. Shisaku-gata Jets serve as enemies in the Machine Labyrinth, Hidden Island 9, and Hidden Island 10 stages of Sonic Rush Adventure. They are seen hovering in the air with their steam-powered jet-packs and will occasionally move up and down. They can sometimes be encountered while the player is using a steam glider to glide throughout the act and therefore, the player must avoid them.