Topic: Course elements Super Mario Maker Wii U

I recently bought a Wii U + Super Mario Maker. Now I've unlocked every course elements according to the game, but I think I miss a few. Like Bowser Jr, Spike pillar (skewer), the Red Cannon, Bullet Bill, Red Bullet Bill and a different form of King Boo. Like when you hit a Tile, multiple Boo's come out of it in a circle (I don't know any other way to describe it, I'm sorry). How do I get these? I updated the game, so that isn't the issue and if this topic doesn't belong here, I'm sorry, I just signed up here.

Pick an object and shake it. Most objects will transform into an altered or different object.

Nice. Will try that when I get home. Thanks.