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After the other turtles come to his rescue and leave the building with him, a chase ensues and the robots fail to destroy the Turtles after they escape with a Ninja Smoke Bomb. After the Shredder leaves on a journey to Japan and tells Karai not to attack the Turtles while he's gone, she purposely disobeys his orders and uses these robots to capture Leo, having him hung in a cage in Bradford's dojo.
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She puts up a strong defense against the robots, though one manages to outmatch her by grabbing her on the wrist. In Follow the Leader, these robots intimidate Karai in Chris Bradford's old Dojo. Afterwords, the Foot Ninjas were replaced. They can also memorize their foes' moves and can emulate them perfectly minutes afterward. These robots, on the other hand, are much more agile. The reason that these robot ninjas were created in the first place is because the regular, human foot soldiers were less adaptable and were defeated too easily in many battles. The Kraang offer to give these Foot robots to the Shredder to assist him in killing off the Turtles, in spite of the fact that the Shredder had just made the declaration that the Kraang are 'useless' to him. They are introduced early on in Season 2. Robot Foot Soldiers also known as "Footbots" - are robotic versions of their human counterparts and now make up a considerable portion of the Foot Clan in this series.