Colin and Felix

The Eggheads are supporting characters in The Amazing World of Gumball, and are a duo of beige-colored eggs that made their first appearance in "The End" at Food N' Stuff.

Appearance
The Eggheads are a pair of beige eggs. One of them has glasses and braces, while the other is relatively bare with acne on his forehead; both have buck teeth, similar eyebrows, and a generally nerdy appearance overall. They both wear pairs of white arm gloves and black footie trousers.

Personality
The Eggheads are the biggest geeks in Elmore Junior High. They speak with British accents, and have an obsession with academics. The two of them are relatively friendly, being sociable enough to attempt to chat with Gumball in "The Genius," and later asking him to be their club president in "The Club." However, The Eggheads are known for harassing other people on Internet forums, shown in The Promise. Due to their nerdy way of talking, tendency to use sophisticated words, and their habit of harassing people on the Internet, it is likely that most people don't understand what they are saying, or refrain from talking to them, causing the Eggheads to be social rejects.

Season 1

 * "The End": They are seen waiting in line at Food N' Stuff.
 * "The Quest": They're on the school bus.
 * "The Genius": Gumball thinks that the Eggheads are smart because they have big heads, so he inflates his head and attempts to chat with them.
 * "The Club": The Eggheads approach Gumball to ask him to be their club president. Upon his refusal, they get angry and plot their vengeance. This is their first major role.
 * "The Ape": An egg resembling Frank was seen in Nicole's flashback.
 * "The Curse": Both can be seen as passengers on an airplane, but with people in between them.
 * "The Meddler": They appear in Miss Simian's classroom.

Season 2

 * "The Sidekick": They are seen in the lunchroom, and Frank talks to Darwin.
 * "The Storm": Bean appears at the school field.
 * "The Voice": Bean is seen on Elmore Plus, and later in the hallway.
 * "The Promise": They are seen on the school bus, and later they talk to Carrie outside Ripley 2000.
 * "The Boombox": They are conducting an experiment with Tobias in the school laboratory, when Gumball and Darwin run by, causing their experiment to blow up.
 * "The Sweaters": They are seen talking to each other outside the school.
 * "The Internet": They are seen flying kites at the beginning of the episode, and later, they hang out at the park.
 * "The Finale": They are in the school bus getting eaten by Kenneth.

Season 3

 * "The Fan": Frank is seen at the school cafeteria.
 * "The Coach": Frank is seen at the school cafeteria, and is shocked by Jamie's apology.
 * "The Joy": Both become victims of the Joy Virus.
 * "The Name": Both of them are riding the bus.
 * "The Extras": They collided with the Exercise Bacon.
 * "The Fraud": They appear in the cafeteria, and later in the hallway.
 * "The Move": They are at the schoolyard.
 * "The Law": They appear screaming, and are later at the park flying kites.
 * "The Allergy": They get sneezed on by Darwin.
 * "The Mothers": They're in Miss Simian's classroom.
 * "The Burden": Frank is present at the park when Darwin talks to "Chris Morris."
 * "The Bros": Frank participates in the basketball match.
 * "The Pizza": They chase Tobias on bikes.
 * "The Lie": One of them can be seen on the bus.
 * "The Saint": Frank appears in the School Cafeteria
 * "The Safety": They can be seen in the school library on one of Darwin's surveillance monitors.
 * "The Society": Bean is part of the secret society.
 * "The Triangle": Both are part of the school marching band.

Season 4

 * "The Return": Bean gets swept away by the flood of balls.
 * "The Pest": Frank is sitting with Bobert and Billy at lunch.
 * "The Gift": They are part of the crowd of students eavesdropping on Gumball, Darwin, and Masami.
 * "The Comic": They are the first people to talk about LaserHeart.
 * "The Uploads":
 * "The Girlfriend":
 * "The Advice":
 * "The Slap":
 * "The Scam":

Trivia

 * An egghead is a common saying for a person who knows much more than common folk would.
 * A character similar to them appears in "The End," "The Dress," and "The Spoiler."
 * Their names were revealed on James Lamont's Formspring.