Dr. Robotnik, Knuckles, Sonic, and Tails from Sonic the Hedgehog 2 HD Wallpaper

Four characters from the Sonic the Hedgehog franchise are standing against a plain purple background. From left to right, they are Dr. Robotnik, Knuckles the Echidna, Sonic the Hedgehog, and Miles "Tails" Prower. Dr. Robotnik is wearing a red and black coat, Knuckles is red and muscular, Sonic is blue, and Tails is orange with two tails.