I found this on another question. And I'll quote it's source when I find it.
It appears in it's front sprite Kyurem form in Black and White, whilst in Black 2 and White 2 it would only show the back sprite of Black/White Kyurem. Obviously, Black Kyurem, White Kyurem and Kyurem all have the same 'coding' or whatever, so that shows the sprites. Game Freak are smart people. ;)
Hope I helped! :)
This is the source. Not the other source.