Robot Butterfly

Pata-Bata (パタバタ) is a butterfly-type Badnik model created by Dr. Eggman that first appears in Sonic the Hedgehog CD. Pata-Batas are seen flying around in many places without having any significant attacks. The Hoverby Mk II Badnik of Knuckles' Chaotix are likely related upgrade models, due to their similar features.

Sonic the Hedgehog CD
In Sonic the Hedgehog CD, Pata-Batas fly around in a zigzag pattern in Palmtree Panic. Pata-Batas are seen broken down due to age in the bad future of Palmtree Panic or sometimes in the present. Damage to them in their degraded state include holes in their wings which causes them to fly slower. They can be defeated by a single Spin Jump, where a flower seed from Little Planet will fall down ground from them after their defeat.

Sonic Lost World
Similar butterfly looking Badniks return at Desert Ruins Zone 2 in Wii U version of Sonic Lost World. At certain points in the level during which Sonic skydives, he must avoid multiple groups of six of these butterfly Badniks flying in circles. These Badniks however, are redesigned with blue wings and orange highlights, two holes in each wing, and a silver metallic body with a visible abdomen. Because Sonic is skydiving, he is unable to attack and therefore must avoid these Badniks instead of destroying them.

Physical Appearance
The Pata-Batas are based on the butterflies. They have pink metallic body with wide eyes, yellow feelers and proboscis. In Sonic the Hedgehog CD, they had round yellow wings. These wings are either clear or have holes on them in certain cases.

Attack pattern
In all their, Pata-Batas do not have any attacks, but instead fly back and forth in certain zigzag patterns. Some Pata-Batas are also seen flying slowly due having holes in their wings.