Galvan

from the tiny planet Galvan Prime.

Galvans are gray-skinned, frog-like, bipedal alien only five inches tall, however their size belies their intellect, which is second to none. They can create almost anything from spare parts and deduce the function of any device at a glance. This ability extends to organic organisms also, determining the position of nerve clusters under the skin of an alien creature they'd never seen before. Their size allows them to squeeze into small spaces, and they can climb walls thanks to tiny suction cups on their skin. They also have sharp teeth, and their slimy skin makes him difficult to grab. However, a Galvans size makes them unsuited for battle, and hence must outsmart their enemies.