Bad Kitty is stylised sample work, based on original 2D character sketches by Robert Taylor (AKA. Bob Taylor) for a pilot episode called Freeway (for NickToons). Other characters produced for the same project include Big Bunny and Nesto.
The mesh for Bad Kitty is relatively lightweight at just over a thousand patches, with the rigging using a mixture of muscle Pose Slider controls for face and hand expression. An IK skeleton controls both the upper and lower body movements with nulls at the wrists and ankles, Aim At constraints on the biceps and thighs keep the limbs bending in a natural direction during animation.