Dr. Eggman

Bocoe and Decoe are Dr. Eggman's robot assistants. They often provide comic relief due to their clumsiness and absent-mindedness.
Appearance
Deco is tall (198 cm), slender, golden-colored, with red eyes. Boco is shorter (145 cm), more rounded, silver-colored, with blue eyes.
Character and role

Both robots are quite kind, but also clumsy and often get into comical situations. They enjoy discussing their constant failures and insulting Eggman behind his back. Their voices and new ideas constantly irritate the doctor.
Capabilities

Boco and Deco can combine to gain new abilities:

"Bokkun's Lighthouse": Boko rides on Deco, and with the light signal sent from his eyes, they can summon Eggman's courier Bokkun.
Physical Combination: They combine into a powerful energy cannon (Boko Buzzock's Decoy Fire).
They share a common dream - to merge into one giant fighting robot, but this remains a fantasy.

Metal Sonic was created by Doctor Eggmann in the likeness of Sonic the Hedgehog and is thus primarily made of blue metal. He has a yellow, circular indentation on his chest with a black center, reflecting the peach-colored skin on his chest. His head has metal fins reminiscent of Sonic's quills and a pair of triangular ears. Metal Sonic's muzzle, shoulder pads, upper arms, legs, and fingers are made of silver metal. His palms are black, and the backs of his hands are square yellow plates. His forearms and shins are made of blue metal, like his head and torso, and he has red feet with white stripes, reminiscent of Sonic's shoes. To simulate a hedgehog's eyes, he has monitors with cameras behind them, giving them a red sclera. He has an elliptical torso. He also has detailed hands, a shiny blue paint job, joints on his arms and legs, and sharp eye holes.

Doctor Eggman (Ivo Robotnik) is the main antagonist of the Sonic the Hedgehog series and Sonic the Hedgehog's archenemy. He is an evil, super-genius (with an IQ of 300) doctor who seeks to take over the world and create a country called "Eggmanland" populated by robots who obey him.
The character wears a red jacket, black pants, and blue-violet glasses. He is 1.85 meters tall and weighs 128 kilograms.
Eggman is extremely narcissistic and selfish, known for being very selfish, sometimes rude, and greedy. His primary motivation is to attract constant attention, and he considers himself the best scientist in the world.