I found these pictures in one of my old Nintendo Power magazines on what appears to be a "Dev box" used by RareWare in England during the production of Donkey Kong Country for the SNES.
Basically RareWare used ACM (Advanced Computer Modeling) for Donkey Kong Country, Killer Instinct, and other titles on Silicon Graphics hardware and software, one being Alias Power Animator. The technique was rather different than most 2D animation. Real world graphics were created through a 3D wireframe model using an Indigo 2 workstation, a unit which revealed the true power of the Super Nintendo's graphics. After creating and testing models, they were transfered to even more powerful computers such as the Challenge XL or Challenge L, and were constructed into solid 3D images which you can find on the Donkey Kong Country series.