Evolving Robo

Does anyone know the exact chance of getting a Gorrilla Robo, and the chance of getting the other ones? I really want a Gorrila Robo, is it still possible? I havent even seen one before. Has anyone evolved their pet to gorrila robo (or dragon to black dragon), thanks in advance.

The Gorrilla Robo is my second most wanted pet(after the as yet unreleased Elephant). I've seen one person on the rankings with it, but this was ages ago. I recall reading that is it someting like a 1% chance to get it. Black dragons are common compared to the Gorrilla Robo.

The Gorilla Robo is rare and so is the Black Dragon, but the percentage remains unknown as far as I know. A logic conclusion will tell us it will be harder to get the gorilla though, because there are 4 other robos to end up with, while there are only 3 other dragons. It took me lots of NX to get my Black Dragon.

@_@ Gold Robo is hard to get too. I have yet to see a single one. Ive seen 2 Gorillas though!