Doctor Eggman's chair

The unnamed floating chair owned by Doctor Eggman is seen in two cutscenes of Sonic Unleashed and also makes another appearance in Sonic Colors. It is stylistic white chair with red chair padding and armrests with small hand pads. The most known feature is having no footset, making it to float in the air. It is shown that Eggman is also able to move everywhere where he wants with his chair, although it is not known how can do that. In Sonic Colors, it shown to being able to move back to original place like a boomerang after Eggman kicks it to bounce everywhere on the room.

In Sonic Unleahsed, it is seen at the front of navigation bridge of Eggman's unnamed hideout, where doctor can see construction status of Eggmanland. The floating chair is once again seen in two cutscenes of Sonic Colors with minor changes. This time it is seen at the main computer room deep inside of doctor's amusement park, where the computer shows status reports about of giant Mind Control Cannon. After the mind control cannon manages to explode and Eggman nevertheless decided to crush Sonic, he moves up to the upper tunnel section and his Egg Nega Wisp with his chair. The chair is not seen since then and would be possibly destroyed along with the ammunsment park.

Trivia

 * Many years before Sonic Unleashed and Sonic Colors, there is seen to be similar looking, floating chair being featured at one of concept arts during the game production of Sonic CD and was later featured as unlockable content in Sonic Generations. Dubbed as "President's chair" in concept art, it would be possible that, this chair would be work as boss vehicle or something similar that Eggman would used as a replacement for his Eggmobile.