TMNT Classic Collection Series (Versions)

[tmntskid]

Someone knows about different versions of this collection? I read someone claiming he had the US version and also I've seen many Asian sellers selling them on eBay kind of cheap.

Is there an Asian version? is it official? If not, how can I differentiate from each other?

Rocksteady and Bebop from this series are in the same situation?

What happened with the prototypes I saw of Krang and Shredder?

Sorry I have many questions. I hope someone can help me.

Thanks.