Sphere Citizens

The Sphere Citizens are minor characters in The Amazing World of Gumball. They first appears in "The Debt."

Appearance
They come in a myriad array of colors and shapes, but most of them are simply spheres with eyes and limbs, hence their name. Some of them either have very little facial features or none at all. A handfull of them resemble established characters like the Pantsbully or Neck Beard while most of the others look like entirely different entities.

Season 1

 * "The Debt": They can be seen as audience members during Gumball's plan.

Season 3

 * "The Shell": They are part of the audience watching the play at Elmore Junior High.
 * "The Butterfly": A couple of them can be seen driving cars on the road during Mr. Robinson's pranking session.
 * "The Spoiler": They are at the Elmore Cinema watching "The Screamening".
 * "The Countdown": They are part of the crowd worshipping Gumball and Darwin.

Season 4

 * "The Return": They are at the cinema.
 * "The Others": They're part of the crowd on the highway.
 * "The Parking": They're at the cinema.
 * "The Romantic": A couple of them are part of the flash mob at the mall.
 * "The Traitor": They can be seen in the cinema once again.
 * "The Blame": They attend the PTA meeting at Elmore Junior High.
 * "The Scam": Some of them can be seen cheering for Gumball, Darwin, and Carrie.

Trivia

 * Since they are used as filler characters in scenes involving large crowds of people, it's highly unlikely any of them will have speaking roles, let alone a major appearance in an episode.
 * One of them appears to be a yellow Construction Man while another appears to be a Guard with a less detailed face.