Tails Doll (also mistakenly called Puppet Tails or Tails Puppet) is a doll version of Tails built by Dr. Robotnik. He is comparable to Tails in the same way that Metal Sonic is comparable to Sonic. The Tails Doll has a metal rod protruding out of the top of its head that leads to a red gem that seems to control the robot's movements. The Tails Doll appeared only in Sonic R, as an unlockable character on the Radical City course by collecting five Sonic Tokens, finishing in at least third, then beating him in a race.
Tails Doll has poor handling, average acceleration and average top speed. He is the slowest character in the game, but he can glide over water like most of his metal allies, and he has a strange floating ability as his "air action", allowing him to remain airborne longer than Tails can. Tails Doll is infamous for his "scary profile" among Sonic fans, as countless memes have expressed this. In fact, in the Archie Comics Sonic the Hedgehog comics, he is portrayed as a killer-cuddly-doll.