Jim & Tim Possible

James "Jim" Possible and Timothy "Tim" Possible are twin brothers, and the younger siblings of Kim Possible, whom she affectionately calls the "Tweebs" (a portmanteau of "twin" and "dweebs"). They are distinguished by the color of the shirts they wear. Tim habitually wears red, while Jim often wears green.

When they're not harassing Kim, they're making trouble with their next wacky science invention, launching rockets, or sending out screensavers of an unexpecting Kim to all of Middleton.

Personality
Jim and Tim have not, to date, appeared apart. Their lines and actions are mostly scripted as if for a single character, and they exhibit a creepy level of synchronization. Antagonistic, anarchic and brilliant, the tweebs care little for rules and restrictions on their activities, and rebel against their older sister's attempts to rein them in. They use a set of invented slang between themselves, which is their trademark sayings: "Hicka-bicka-boo!" and "Hoo-sha!", used as a call and response interchangeably.

Family
Kim is their older sister, whom they antagonize mercilessly. James Timothy is their father and namesake. Ann is their mother, and Nana is their grandmother. Cousin Larry, Aunt June, Slim Possible and Joss are naturally also their relatives.

Personal History
The tweebs were born sometime during Kim's pre-K year. Even at the tender age of ten, they constructed an array of amazing and often destructive devices out of the parts made available by their father's experiments. At the age of twelve, they were admitted to Middleton High School a couple of years early.

Relationships
They're friends with Ron Stoppable, Rufus, and Wade. For a time they also socialized with Bonnie Rockwaller, mostly to antagonize Kim.

Talents and Skills
Mechanical and scientific prodigies. Gifted problem solvers.

Metafictional Data
Their voice was originally provided by Shaun Fleming. Since their redesign, it has been provided by Spencer Fox who is best known for voicing Dash Parr in the Pixar movie The Incredibles.

In the German version they are called "Zwombies", a portmanteau of "Zwillinge" (twins) and Zombies.

Trivia

 * Their Birthday is September 23rd, 1994.