Nothing official really, just some observation and inspiration. You know sometimes we look at clouds and we see shapes and objects, this is the vision I got while looking at some DKC2 clouds, I will try to do a full body version soon, what do you guys think?
Looking at the pics. It looks like that's the area where the two images were 'mirrored' and then 'stiched' together to tile the cloud sprites. Just look at the center of the clouds you can kinda see a seem. Patterns tend to emerge when you mirror two images together.
I doubt the shape is supposed to be a Kritter from DK64. One thing that makes be doubt is that the game didn't come out until late 1999. If it was to do with DK64, that would suggest that Donkey Kong 64 started development about 1994 or 1995 before the N64 was even released, and therefore the Kritter model had already been designed, and that DK64 had taken 5 years to develop, but I'm sure it wasn't that long. Maybe 2 years or 3. I'd say development of DK64 started around 1997 at the earliest, maybe?