The Neutrinos are a race of extra-dimensional humanoid aliens from Dimension X. These characters were invented for the 1987 animated series and first appeared in the episode "Hot Rodding Teenagers from Dimension X". They're easily identified by their pointy ears and crazy hairstyles.
Zak and Kala can be seen in the background of Chrome Dome's stage, Art Museum in the SNES version of Tournament Fighters.