Empty Number
Smash Journeyman
It's not that holding it would necessarily affect side B. I think that holding it without a reliable way to put it back on K. Rool's head presents a problem accessing the rest of his move set, as if this is the case K. Rool only gets to side B once and then if he wants to side B again he must either wait for the crown to disappear and re spawn, or pick it up item-style and throw it himself. This is a tough choice because it means either waiting or restricting your access to normals.There's a lot of things that could be happening here, hopefully we get more footage eventually, so we can clear it up. I don't think being able to hold the crown would hurt side B, it could work like R.O.B's gyro.
We'll of course find out soon, but that's why I see the crown as snapping directly to his head if he picks it up when the crown is on the ground.