New Japanese Mario Tennis Open Trailer

A new Japanese Mario Tennis Open Trailer has surfaced around the internet. It features new footage and old footage, mostly new of what we have not yet seen before.

http://www.youtube.com/watch?v=VPPBfdmjyyY

Notice that there is a Koopa suit. Could this mean Koopa Troopa is the last secret character? Time will tell, as the last secret character is still unknown!