Twins are often treated as the "thinking engine" who come up with plans (be those devious or truly smart) because, well, there are two of them, and they are on the same wavelength (more so than just regular friends) so they can come up with things among the two of them more effectively than other two characters, which would involve a lot more explaining yourself and arguing.
Putting these guys on Mission Control
is also quite logical - often you need to show that technical equipment takes more than one person to operate, but both people essentially do the same task, and it would be a waste to characterize separately two people who essentially fulfill the same role on the team (or, on the other end, sacrifice two interesting characters to do one job).
May overlap with Trickster Twins
Anime and Manga
Film - Animation
Film - Live Action
- Fred and George Weasley from Harry Potter, even though they're more Trickster Twins, it did take a certain amount of brain power to make all the Weasley Wizard Wheezes.
- Beltira and Belkira of the Belgariad and Malloreon. They spend most of their time in the Vale of Aldur trying to decipher a multitude of complex prophecies, while the other sorcerers act on what little information they can find.
- Doug: Al and Moo Sleech
- Detention: Orangejella and Lemonjella LaBelle
- The "tweebs" from Kim Possible. Granted, everyone in the Possible family is a genius, but the twins are significantly smarter than their older sister. And also twelve. And in high school.
- Johnny Test: Susan and Mary Test.
- A set of overachiever twins seen in one episode of Static Shock.
- ThunderCats had Wily Kit and Wily Kat, who, as their names suggest, were quite wily. Lion-O had to face the pair of them to overcome the Trial of Cunning.
- The Platypus Brothers from Tazmania.
- Rhona and Andy in Iron Man: Armored Adventures. Subverted in that Rhona's an only child, and Andy's an android she built.
- Can be truth in television, as research studies of twins can attest.