uhm? I don't know if it's ensured, or you might generally ask how will Koopalings be in all other main games
for 3D games, I think just like in Sunshine and Galaxy, they need bosses with different attacks and ways to defeat
Koopalings in traditional 2D games mainly have simple and similar attack with shell dash
only if that they change their way to attack in 3D version
I'd care more about whether Mario 3DS could play some other new thing in main story like Daisy and Toadette engage....