User blog comment:Tepig921/SSB3DS Leaks Fully Confirmed! My Bionis is Ready!/@comment-24128208-20140825210201/@comment-32390199-20140825211940

We saw a trophy of Larry Koopa in a KCC, which he doesn't have in any of the games in that form, so I guess the Koopalings are Bowser Jr. alts.

Also the people from the video also said that they hadn't unlocked everything by the time the pictures were released, but the other locked characters were said to be: Dixie Kong, Ridley, Impa, Mewtwo, and Mach Rider.