Neutrino (Teenage Mutant Ninja Turtles, 2012)

Neutrinos is a nickname given to a species of microscopic alien robots. The real name of their species is unknown.

Biology
Neutrinos are armored, bipedal, robotic creatures. Microscopic in size, they are capable of infecting the brains of organic life forms and gain access to their knowledge and memories.

Culture and society
Neutrinos travel through space in tiny spaceships and are employed by other species to infiltrate the brain of a specific target and steal information directly from the target's mind.

Appearances

 * Teenage Mutant Ninja Turtles, s04e06, "Journey to the Center of Mikey's Mind" (2016)