Mecha Tails (Prototype Mk II) was the second of the Mecha Tails Project created by Mayor Scamboli. He used Mecha Tails to take care of Tails. Unlike Tails Doll, Mecha Tails is more robotic and menacing. But when it want's more power, it absorbs the power of the Master Emerald to become Super Mecha Tails.
Scamboli brings Mecha Tails to fight Tails, but it got scrapped by Tails.
Mecha Tails was reprogrammed by Scamboli and Luda to protect one of the Generator in the past. However It only has one thing in mind, kill Tails. After his second defeated, it absorbs the power of the Master Emerald to become Super Mecha Tails. But Tails still scrapped it to dust.