The Neutinos were a group of teenage rebels from Dimension X. Their main members include Zak, Kala, and their leader, Dask, and they travel in a flying car-like vehicle. The Neutrinos have allied themselves with the Teenage Mutant Ninja Turtles many times.
This raises the question of whether the Neutrinos are a resistance force of sorts or a race. Up until the incident with Tribble, it seemed they were the former, afterwards things are less certain.